Urban quality of life in the new urban districts in Scandinavia
CITIES FOR
PEOPLE - Walking in the 21st century - Copenhagen 9-11 June 2004 (Minor
adjustments November 2006)
Bo Gršnlund
Kunstakademiets
Arkitektskole, Philip de Langes Alle 10, DK 1430 K¿benhavn K
tel +45
40525181 (mobile) +45 32686639 (office)
email mailto:bo.gronlund@karch.dk, homepage http://bo.gronlund.homepage.dk/
Abstract:
The project
'The informational city and the street as urban form' pose the question whether
newer urban districts built with goals of urbanity since the early 1980s really
became vibrant urban places. A quest for more urbanity - also in new urban
districts - broke though in Scandinavia together with postmodernism 25 years
ago and several areas with this goal have been built. The planners have
typically been concerned with a more traditional urban pattern of blocks,
streets and squares, a mix of functions and visible people in public space.
Most of the
new districts have been a success concerning housing quality, public services,
green spaces and car traffic calming. Some also have considerably lower crime
rates but there are also examples of the opposite. Mixed functions including
shops and private offices have proved difficult to in at the intended amount.
Traffic calming is here part of the problem, as none or too little through
traffic makes the customer base smaller than necessary.
The
projects empirical studies follows the development of the public street life,
private enterprises and the spatial structure of the movement network over a
period of 10 years.
The
empirical studies shows spatial configurations where the grids of movement
lines are too fractal in their character and also have a quite uneven
distribution of lines, too many lines and too many short lines. Pedestrians in
public space are few, often close to zero, not only because of the spatial
design, but also because wealth means few residents/km2, unless extreme
floor area ratios are used. The most central parts of the movement systems in
the new districts have some pedestrian life, but it is difficult to get the
vibrant urban quality outside of the traditional old urban cores. Shops and
private firms often don't find the new districts attractive enough. Architecture
also often is too monotonous overall, with large units and a too limited number
of developers and architects.
The
conclusion of the project is that the promotion of urbanity outside of the old
urban cores demands a careful selection of qualified places and a programming
that goes further than formalism combined with optimistic hopes for a
functional mix, happening by itself if only permitted to do so.
At the same
time we need a better understanding of thresholds of urbanity, where
quantitative changes of 'intensity' of people and 'works' of culture and
creation might mean a qualitative change of situations from no urbanity, to low
level urbanity, to central place urbanity, to actual crowding and maybe
information overload.
If goals
for urbanity shall be meaningful and possible to evaluate and used in practice,
a greater agreement on the concept and its complexity is needed, although it
should not be too rigorous and probably never can be complete.
Brief
biography
Bo Gršnlund
Architect
maa, sa., with degree from Chalmers University, Gothenburg and research
education at Nordplan in Stockholm. Born 1942 in Malmš, Sweden.
Associate
professor, Royal Academy of Fine Arts, School of Architecture, Copenhagen, in
the fields of urban theory, planning and design, and member of the working team
at the Centre for Urbanism. Teaching and research especially on urbanity and
design of new urban districts in North Western Europe in the information age.
Co-author
of Danish and European guidelines on safe cities. Member of the International
CPTED Association.
Own
consultancy firm, working with issues of pleasant, safe and exciting cities.
Working
experiences also includes urban policies for Institut for Center-planl¾gning
1966-76, the Nordic Counsel of Ministers 1979-87, the EU Commission and Reading
University in the 1980s, local and regional authorities and housing companies
in Denmark, Sweden, Norway, Finland and the Netherlands. Guest professor at
University of Washington, Seattle, USA in 1994
.
Bo Gršnlund:
Urban quality of life in the new urban districts in Scandinavia
CITIES
FOR PEOPLE - Walking in the 21st century - Copenhagen 9-11 June 2004
In affluent
cities with advanced planning policies and cultural events, walking and
bicycling is increasing in central city areas - or have been increasing in the
last decades. In some cities the renewed urban life in public spaces is spilling
over into neighbouring districts as well, as in N¿rrebro and Vesterbro in
Copenhagen. This has been noted not only by Jan Gehl and other urban
researchers here, but also e.g. by the international magazine 'Wallpaper', that
ranks Vesterbro among the most interesting creative areas in the world today.
In most of
theses places the increased number of pedestrians, the increased number of
cafŽs etc. is not primarily related to an increasing number of people living
and working there. City life is going up while residents and employed are
fairly constant or may be even decreasing. Some of the change might be
explained by new kinds of people gradually taking over floor space and real
estate in these areas, but most of the people you find in the public spaces in
the inner city districts come from somewhere else - tourists from far away,
people from the suburbs, etc.
In most of
the rest of what is normally called 'urban areas', that is in more than 90% of
the built up areas, there is only little urban life to be seen in most places
most of the time. On many streets, roads, and footpaths the pedestrians and
bicyclists are very far between.
A zero
sum game?
On first
thought therefore, urban life might be a zero sum game. The day has only 24
hours and most of them don't not take place in public. Further, the total
population in the city-regions of north western Europe is fairly constant these
days. The big reduction in the number of working hours per person are also
possibly over. And in Scandinavia, female employment outside the home is now
almost as high as is ever possible. Etc.
Then, if it
is a zero sum game, for every pedestrian in the urban core there will be a
pedestrian less in the suburbs? Is this the 'price' we are paying for inner
city success?
This is
probably partly true, but there are also other factors involved that tends to
increase public life in the city for the average citizen, like a new interest
for everyday exercise, the growing of special interests in the city, higher
affluence that leads to more use of a variety of city functions, a growing
number of 'events', a growing share of people who live as singles and need to
see other people, a larger proportion of the population that are students, more
people on early retirement, more pets to be walked, longer walking distances to
parking lots, etc. - just to mention some of the possible explanations for a
growth of the total level of activity in public space.
On the
other hand, there are also factors at play tending to reduce public life in the
city and even more so in the suburbs, factors that e.g. reduce walking and bicycling:
a thinning out of the city through affluence, inward oriented lifestyles, and
an 'urban' planning that in practice contributes to low average built densities
and traffic systems that contradicts urban public life. In north western Europe
we don't have unplanned sprawl - but dispersion we have anyhow, even if not as
bad as it could have been.
Maybe this
is also how a majority wants to live - to dwell in peace with a lot of empty
space in the suburbs and outlaying areas, but to have the possibility to enjoy
themselves in the city centres, when they feel like it. The best of both
worlds? In spite of a too wasteful behaviour.......
At the end
of this paper, I will come back in more detail to some of the general aspects
undermining public life outside of the inner city areas. For now it is just
necessary to sum up the introductory remarks about urban public life in north
western Europe:
a) Urban
life is to some extent a geographical zero sum game
b) There
are factors that tends to increase the overall level of urban public life
activities
c) There
are other factors that tends to decrease the overall level of urban public life
activities
What the
concrete results will be and where is a dynamic issue, that we need to
understand better, even knowing that urban processes will never stop changing.
For now,
outside of the inner city areas - as a net effect - walking, bicycling and
urban public life is mostly part of a daily life routine and often rather
trivial, unless it happens in interesting natural surroundings. There might be
exceptions from the routine though, like beaches in good weather, a local
harbour, a sports event, an occasional festivity......
The only
places outside of the inner city areas, where you normally see a lot of
pedestrians, besides at some transportation nodes like airports and other
traffic terminals, are the large suburban shopping malls. Here there might come
20.000 visitors a day, but in a very controlled, often rather monofunctional
retail environment and with little 'ring' effects on the public life in the
surrounding areas, the McDonalds in the mall working as the local meeting
place. Even suburban campus universities contribute rather little to public
life in their surroundings in this part of the world.
Attempts
to make a difference: newly planned urban districts with goals of urban life
Beginning
in the late 1970's - after a heavy but in most cases not very precise critique
of post World War II modernist urban planning - a 'post-modern' urban design
was introduced in north western Europe. It built theoretically, if you can call
it that, on architects like Aldo Rossi, the Krier brothers, and a renewed
interest for the European built urban heritage from before Le Corbusier,
Bauhaus, CIAM, and the modernist state-approved planning guidelines. Jan Gehl
also created a growing interest for 'life between buildings' from the 1960's
onwards - but 'life between buildings' is not necessarily the same as urbanity.
In Sweden
the major new show cases were in Stockholm: the SkarpnŠck district, mostly
finished in the mid 1980's and the Sšdra Station inner city district, mostly
finished in the 1990s.
In Denmark
the major show cases were in the Copenhagen metropolitan area: the H¿je TŒstrup
station district, of which important parts are still unbuilt, and EgebjerggŒrd
in the commune of Ballerup, built gradually over a decade until it became a
major Danish housing exhibition event in 1996. These four 'project's all cover
about the same area in size, roughly a half square kilometre each. They have
streets, squares and urban blocks that seemingly break away from modernist
physical planning principles as well as intensions of a functional mix with
different kinds of housing, shops, offices and public services - and supposedly
good conditions for pedestrians and bicyclists too.
Figure 1 The 4 case study areas in the
Copenhagen and Stockholm regions

These new
urban districts have had the very best planning conditions: local politicians
with the best intensions of making something extraordinary, mostly publicly
owned land, architectural competitions, planning consultants and contributing
architects with a high reputation for quality solutions, a lot of welfare tax
money to spend, etc.
The built
density of the areas varies rather much though, from a floor area ratio of 2.0
in Sšdra Station, to 1,0 in SkarpnŠck, to 0,8 in the built up part H¿je
TŒstrup, to only about 0,25 in EgebjerggŒrd. The number of residents varies
from about 9000 in SkarpnŠck to on less than 1000 in H¿je TŒstrup, the latter
having a number of employed that have to be counted in thousands instead.
Another important difference is the degree of 'isolation' from the surrounding
urban fabric, with three of them built mostly as islands in the landscape at
10-20 away from the city centre, while Sšdra Station is a new part of the inner
city of Stockholm.[1]
The quality
of life in these districts related to dwelling standards, amount of public
services, greenery, ecological concerns, and accessibility for the disabled is
quite high and shall not be debated here. The question is what happened to life
outdoors and in public spaces there.
Several
reviewers have expressed disappointment with the urban quality of these
projects and interviews with the residents show a preference for a green
environment in relation to the dwelling, much more than preferences for urbanity.
Walking
and bicycling there - most of the spaces empty most of the time
In each of
the 4 areas a mixed loop of possible movement was selected that had an overall
length of 6-7 kilometres, taking about 1 1/2 hour to walk, each containing
about 100 different movement line segments. These loops have been walked an
average of more than 20 times in the mid 1990's and again, although not as many
times, in 2002-2003. The loops were selected in such a way, that they comprises
major pedestrian and bicycle routes as well as minor ones, and the most public
streets and lanes as well as more 'private' ones through courtyards and back
areas. In a space syntax context, you can say that the loops try to cover a
selection of the whole spectre of lines of different integration values from
the highest to the lowest and a lot of lines in between the extremes. All
together, these routes have been walked for a total of more than 600 kilometres,
at different times of the day, at different days in the week, mainly in rather
good weather in the warmer half of the year.
On these
routes all people on the same lines moving against the observer have been
counted as men, women or children respectively. Visible static people,
standing, sitting, or playing along the movement lines and in a distance of up
to 15 meters from it, have been counted as well (in the courtyards all the
outdoor people being there has been counted).
Below the 3
suburban cases are covered in relation to pedestrian and bicycle activity.
In
EgebjerggŒrd...... (to be continued)
In H¿je
TŒstrup, that has the least number of residents, the average number of people
coming against you is 2,8 in 100 meters and the static people are 1,6 in 100
meters, that is an average of 4,4 people. In these numbers a walk inside the
large regional shopping mall City 2 is included! Most people were to be found
inside the shopping mall, as you might guess, where the max line had 32 moving
people and 21 static in 100 meters. The bus terminal by the railway station, at
the other end of the district, came in at 13 people moving and 17 static in 100
meters. The scary thing though was the discovery, that 81% of the lines walked
had less than 3 people/100 meter, moving and static taken together. And close
to 50% of the lines had less that 1 person/100 meters in all. Most of the lines
were empty or almost empty most of the time. Of the people that anyhow were
there, on average there were 18% more women than men, and very few children.
This tendency was the same both for moving and static people.
In
SkarpnŠck, that has the largest number of residents, the average number of
people coming against you is 1,6 in 100 meters and the static people are 2,6 in
100 meters. That is an average of 4,3 people all in all - very close to the
average in H¿je TŒstrup, but with no shopping mall and no large railway
terminal in the area. Most moving people are to be found at the central part of
the major boulevard inside the district, SkapnŠck's AllŽ, with up to 8,2
people/100 meters coming against you. In the most intense part of central
streets and squares, you might also find on average of 2 to 4 static people/100
meters. 16% of the all the lines in SkarpnŠck have less than 1,0 people -
moving and static together, and 56% of the lines has less than 3 people/100
meters. Of the remaining 44% of the movement lines, the 16% are in courtyards
with many small children playing, mainly because of childcare institutions
there. Most of the movement lines in these courtyards are also quite short, so
standardised numbers/100 meters gives a distorted impression of the actual
activities. Anyhow, this leaves us with only 28% of the lines with a 'normal'
public life above 3 people/100 meters for moving and static people taken
together. Not much for a compact new urban district with 9000 residents and a
floor area ratio of 1,0.
In
SkarpnŠck there is 15% more women outdoors than men, the major difference from
H¿je TŒstrup being the far greater percentage of the people outdoors that are
children, especially static (i.e. playing) children. In SkarpnŠck 50% of all
observed people outdoors are children, while in H¿je TŒstrup (including the
shopping mall) the children are only 11% of the observed people
.
Table 1
Average number of people/100 meters on movement lines in H¿je TŒstrup and
SkarpnŠck
(pedestrians
+ bicyclists), 1995, average through the day
|
|
Moving
against you |
Static in
space |
All |
|
EgebjerggŒrd |
0,4 |
0,9 |
1,3 |
|
H¿je
TŒstrup including mall & station |
2,8 |
1,6 |
4,4 |
|
SkarpnŠck |
1,6 |
2,6 |
4,3 |
Table 2
Maximum number of people/100 meters on movement lines in H¿je TŒstrup and
SkarpnŠck
(pedestrians
+ bicyclists), 1995, average through the day
|
|
Moving
against you |
Static in
space |
All |
|
Egebjerg
Bygade shopping
section |
4 |
3 |
7 |
|
H¿je
TŒstrup - inside
shopping mall |
32 |
21 |
53 |
|
SkarpnŠck
- part of central boulevard |
8 |
1 |
9 |
Table 3
Percentage of movement lines with very few people (pedestrians + bicyclists,
both
moving against you and static in space), 1995
|
|
less than 3 persons/100
meters |
less than 1
person/100 meters |
average
length of walked
lines, meters |
|
EgebjerggŒrd |
87 % |
55 % |
55 |
|
H¿je
TŒstrup |
81 % |
50 % |
75 |
|
SkarpnŠck |
56 % |
16 % |
61 |
As you
might expect, the number of people/100 meters is less in EgebjerggŒrd, that is
less densely built. The some degree the built density and the number of moving
people seem to scale, when EgebjerggŒrd and SkarpnŠck are compared.[2]
Over all,
the main conclusion is that most of the urban spaces are rather little used.
It is not
because of heavy car traffic, spoiling the local environment, that public life
is week. All the areas have traffic calming and different measures to prevent
through traffic - in most of the places most of the time there is only few
moving cars.
To test
another approach than moving and static people along lines, the most central
street crossings and 'squares' were studied in another ways as well. A kind of
'mental carpet' was imagined there, and every pedestrian or bicyclist coming in
'on to the carpet' was counted. If they entered a shop at the edge of the
'carpet', they were counted coming out of the shop as well, some of them in
practice being counted twice or more. With this way of looking at public life
at central nodes in the districts, it was possible to reach levels of more than
1000 people/hour in the afternoon rush period in all of the districts except
EgebjerggŒrd, where you got about 600-800 people/hour as a maximum..
In the
three districts with railway or underground stations much of the urban life is
pulled that way, while in EgebjerggŒrd, that is only serviced by buses, urban
life related to public transportation is more dispersed to and from several bus
stops. This was also the case in SkarpnŠck before the underground station
opened there in 1994. The opening of the station then gave an increase of about
20% of movement on the central boulevard, as people preferred to walk or bike
longer to a more efficient means of public transportation.
As in the
much more studied downtowns and shopping malls, the urban life activity in the
new districts mentioned here, is rather cyclical, varying with time of the day
and day in the week. There are peaks in the morning and in the afternoon on
weekdays, and sometimes also a little peak around lunchtime. Even where
dwellings dominate, weekend activity is generally lower than weekdays.
The opening
hours of shops play a role for the distribution or concentration of shoppers in
time. In the beginning of the observation period, 10 years ago, legal shopping
hours in Denmark were much shorter than in Sweden. This created a more
noticeable peak of shoppers e.g. in EgebjerggŒrd than in SkarpnŠck. Later, the
shopping hours have been prolonged in Denmark, and the shopping peak hours in
EgebjerggŒrd is no longer as important as before - this also means less
probability of chance encounters.[3]
Compared to
downtown areas, the new urban districts might have a more stable level of
outdoor activity independent of the seasons, because most of the activity in
the new districts are routine activities, which take place all the year around.
This has yet to be analysed though.
The kind of
activities you find in public space in the new districts are related to
journeys to and from work, children walking or biking to school (the ones under
school age accompanied by a parent), a little bit of rather local and daily
kind of shopping, walking the dog, some jogging, an occasional meal at the
local pizzeria, and the like. Children plays in designated playgrounds,
especially if close to institutions for children or if there are extraordinary
facilities. It happens that people, by chance, meet and talk, but as public
life is thin, the probability of unplanned meetings is small too.
On rare
occasions you might also find district festivities - once a year in
EgebjerggŒrd and maybe - maybe not in SkarpnŠck. When the festival heydays in
SkarpnŠck were at their best, in 1993 to 1995, more than 2000 people an hour
walked up and down the central boulevard for several days in a row. Later the
yearly festival there moved out into the green fields and almost died.
All the
numbers above are from countings in the 1990's. Renewed investigations in
2002-2003 show daily patterns and activity levels that are much the same, or in
some spaces even a little lower, with the major exception of the central part
of Sšdra station, that now has to be included in the Stockholm central places
of citywide importance, and with a downtown like nightlife too. SkarpnŠck has
changed the most, though not in numbers overall but in the percentage of
immigrants, ethnic diversity, a peek of teenage residents and a rather severe
growth of crime.
Walking
and biking urbanity
Walking or
biking in the city is not just a question of numbers though, or what kind of
specific purpose your tour has. It is also one of the possible ways to get to
know your world, to learn something new, or to experience something unexpected.
It could also be an unplanned meeting with someone you know but have not talked
to for some time. Or a possibility to show some aspect of yourself and your
abilities to others. All this includes exchange of cultural signals of
different kinds. In an urban setting this might be related to the notion of
'urbanity'.
Modern
urban planning from the CIAM of the 1920s onward, have had little interest in
urbanity. The focus has been on practical functionality and a limited,
minimalist repertoire of special aesthetic expressions. Urbanity as a quality
in the city in, its own right, has also been poorly understood at a scientific
level, even if a lot cities in the last 20-25 years have tried to market
themselves with notions on great urban experiences there. If you really are
going to understand urbanity, I think the city has to do with an elementary
social and cultural playing field, where things that happen can be seen in the
perspective of information theory, interrelated networks, game theory and the
emerging understanding of complexity and chaos.
As far as I
know, a systematic, richly elaborated and empirically qualified notion urbanity
still does not exist, although it is possible to find bits and pieces by many
different scholars, like Johan Asplund, Henri Lefebvre, Richard Sennett,
William Whyte, Bill Hillier and others.[4]
My own super-short definition of urbanity would be, that urbanity is a rich
information field between humans and between humans and human artefacts in
public space, where the new and unexpected can happen and where it can happen
in ever new combinations and in growing complexity. Related to this, urbanity
also has to do with difference and the unique.
For
Lefebvre and Sennett a high urbanity is desirable for political reasons, for
others a high degree of urbanity might have other positive connotations, being
just fun, socially stimulating, creative - or what ever. Whether you want a
high degree of urbanity or not - and where - cannot be argued in general
though, I think. It has to depend on the context. In relation to walking and
biking, urbanity might be one of the reasons for walking more and biking more.
When you look at were voluntary 'non-purpose' walking and biking takes place,
just for the joy of it, you find it either in traditional city cores or in
recreationally interesting places in nature. These very different settings
share some of the notions in my definition of urbanity: they are both
information rich, full of possibility and complexity - the difference being the
very different frequency of meetings withy human exchanges and human artefacts.
So to
stimulate walking and biking, you have to create an environment with either
more 'urbanity', a more interesting complex nature, or some kind of working
combination here of. And by the
way - related to means of movement - trains and other public transportation
have some space for urbanity as well, while cars have not much to do with urbanity-
isolating people in fast moving containers - except in special cases like a
show of exceptional vehicles.
Experiencing
urbanity in the new districts
Just to
count people moving and staying in public space is not enough to evaluate the
quality of the environment, although it is a necessary beginning.
If you
think urbanity is important for the use of public space, then it could be
interesting to break up the concept of urbanity into aspects
that can be
studied empirically. From the notions of urbanity mentioned above, it is
possible to construct the following table, that tries to list some aspects of
urbanity a little closer the practically observable. Out of the to types of
relations - human /human and human/artefact - and two major kind of qualities
of urbanity - human information richness and possibilities for the 'new', four
fields of further observation can be generated.
Table 4
Some aspects of empirically observable urbanity (the lists can be extended)
|
|
Human/human
relations |
Human/artefact
relation |
|
Information rich, rich in difference, complex,
unique |
Number of
people walking, biking and staying, all kinds of people, people that are
different, people showing off to others, people performing in public, people
in pairs and groups, people talking to each other, people spending time in
the context of others, people working outdoors / in public space |
Buildings
and builders /100 meters, ornamentation, numbers of doors, interesting shop
windows, art in public space, personalised environment, front gardens,
benches, a manmade place with an identity of its own |
|
New, unexpected, unplanned, open to initiatives |
The
proportion of strangers, the occurrence of chance meetings, people stopping
and talking in the middle of the flow, people 'hanging out', individuals or
groups 'taking over' some spaces temporarily, special events (festivals,
etc.), political demonstrations, children playing in spaces not designated
for them, using public space for fitness purposes |
Something
unfinished, possibility to alter the environment, possibilities for individuals
to personalise spaces, temporary exhibitions in public space of art and/or
goods, spaces that can be used in many ways |
The
human/human relations in the new urban district are to a large degree
characterised by routine daily life activities. As mentioned earlier, the
number of people in public space is also often quite low. This means urbanity
is week at its very basics and that activities, coincidences and events that
need numbers to happen will only happen rarely. Many spaces are also poorly
designed to accommodate diverse human activity there, or there might be
tendencies to prohibit unplanned initiatives, like teenagers hanging out.
Information richness and 'newness' in human/human relations in public space in
these districts to some degree is related to the number of foreigners - the
ethnic diversity - especially in SkarpnŠck. This means that you see many
cultures at once on a daily basis, but so far the interaction between people
from different cultures primarily happens among the children.
basis
The
human/artefact relations in the new urban districts are also a quantitative
question at the outset. How many different builders and how many architects
have been at play there? How many different spaces are there for possible personalisation?
How many shops are there, how many windows with displays? Etc. From the outset,
in all of the four new districts, there have been a lot of good intentions to
create variety and mixed use. When enterprises, builders, the timeframe of
development, public finance, and the structure of contemporary retail come into
play, though, in the construction of the new districts, the results have
difficulties living up to the good intensions. A rather limited number of
builders and architects, a forced development supposed to be finished in a few
years, and
difficulties
in reaching mixed use goals undermine urbanity in all
the
districts, more or less. To take SkarpnŠck as an example, in the major part of
the development, the average number of urban blocks per builder and
architectural firm is 8. This is a big difference from an traditional inner
city situation, where you normally have several builders per block. A
significant proportion of shop space have also been empty or underused for
years because of too weak a customer base, unfavourable locations in the
spatial structure within the district and a combination of isolated districts
and traffic calming. High taxes in the Scandinavian welfare societies also
contributes to difficulties for private services for ordinary people - as
people have to work 5 hours to pay for 1 hour of services (after taxes), you
get a do-it-yourself economy and a through-away-economy.
To create
urbanity from scratch seems to be very difficult. The affluence and the high
welfare levels might even contradict urbanity?
The way
we live and the thresholds of urbanity
Space
syntax analyses has shown, that part of the problem of little used streets and
paths in new districts are related to the spatial structure, often with weak
integration and too many and too short movement lines. But the spatial
structure or even the built density are not enough to explain the under-use of
public space in the new districts.
To get a
wider picture of what has happened with the use of public space in north
western Europe in the last 100 years the table below tells a dramatic story.
Table 5.
Change in some urban factors in Copenhagen in a 100 years
|
Aspect |
New
working class city area 1880-1900 |
New
district in the suburbs
1980-2000 |
Difference |
|
Indoor dwelling space / person |
ca. 8
sqr. meters |
ca. 60
sqr. meters |
7 times |
|
Built density (FAR) Floor area ratio |
ca. 2,0 |
ca. 0,3 |
7 times |
|
Length of streets and paths / sqr. kilometre |
ca. 20
kilometres (Vesterbro) |
ca. 60
kilometres (EgebjerggŒrd) |
3 times |
|
Unique 'works' / 100 meters of street (buildings, shops, art, personal decoration) |
ca. 25-50 |
ca. 2-6 |
10 times |
|
Children in school & institution 0-20 years of age |
ca. 4000
hours total |
over
24.000 hours total |
6 times |
|
Time spent on other media / day than public space |
less than
1 hour |
ca. 6
hours |
6 times |
The density of people living per square kilometre has been lowered dramatically, the density of movement lines have
increased, unique works have decreased, children have been removed from the
street, etc. E.g. the first 3 factors combined, 7x7x3, means that in average
the chance of meeting someone while walking has a probability that is about 150
times less in new districts now than a hundred years ago. That's when the
number of 'trips' per person per day out and in of buildings is constant, but
they have probably decreased too. Walking, looking at human artefacts, has
become more boring too, roughly maybe 10 times as boring per 100 meters of
street because of long repetitive buildings, several blocks with the same
architect, few interesting shops, windows, etc.
These things are very difficult to change. Planning
therefore have to be much more careful than before, and much more conscious
about what qualities are really possible in different contexts. If the wanted
urbanity cannot be achieved in real life, qualities of nature have to be in
focus instead - this is also what has happened in the last 10-15 years.
To be able
to qualify judgement about urbanity in a specific setting, it might be useful
to think of possible thresholds of urbanity - I call them the 'Phase
Transitions of Urbanity'.
Phase
transition are like the transition points of H20 - from ice to water
at 0 C, from water to steam at 100 C, from steam to plasma at very high
temperatures. Maybe urbanity also has phase transitions, although less precise.
Table
6. Phase Transitions of Urbanity
(tentative)
|
Urban
Phase Change |
The City of People (human / human relations) |
The City of 'Works' (human / artefact relations) |
|
Crowding - possibly experiential stress |
more
than 10.000 persons / hour, or less
than 4 sqr. meters/person |
more
than 10.000 / hour ? |
|
Urban Centrality, lower limit level |
more
than 1.000 persons / hour, or 25 /
100 meters of street |
more
than 1000 / hour, or 25 /
100 meters of street |
|
Basic Urbanity, lower limit level |
at
least 3 / 100 meters of street, or 3
within 100 meters visual field |
at
least 10 unique houses / 100 meters of street (
street entrance oriented ) ?? |
Crowding
starts, when the number of people in a space is so large that the average
distance between people is less than an arm's length. Stress might happen when
the consciousness can't cope with the amount of information. The limit of
consciousness is 16 informations/second.
The lower
limit of centrality as an experience of being in a central place, is when the
emotional centre in the brain starts to get bored, i.e. when there is more than
4 seconds between emotional events. A continuous stimulation therefore demands
at least about 1000 new inputs per hour, average (a mood can last longer
though).[5]
Below a
certain level, a built up area loose its urbanity, even if the statistical
bureau or the urban planning classifies it as urban.[6]
The largest social visual distance is about 100 meters, and 3 persons visible
within that distance is the least complex social situation that is meaningful
at all.[7]
Public space less populated (on average) than that cannot be considered urban
seen as the city of humans in public
space. A
street of unique, individual, 10 meters long houses with gaps no more than 10
meters can maybe be considered as minimum urbanity of the city of creative
works.[8]
Difficulties
with urbanity in new districts built at the edge or beyond push forward the
question of other or supplementary strategies that possibly can have a greater
success, i.e. a gradual addition and restructuring of nodes and streets outside
of the city centre, where the preconditions for a development of the wanted
qualities already exists to some extent.
Bo
Gršnlund, June 9, 2004
PS. This
paper will be complemented with more facts and an illustrated Powerpoint
presentation at the conference. The extra material will be made available on my
homepage or through a link there after the conference. Have a look then at http://bo.gronlund.homepage.dk/
[1] On my homepage http://bo.gronlund.homepage.dk/ I
have described these four urban districts in more detail and with many
illustrations. In English - in reverse chronological order:
For the International Space Syntax Symposium in 2003: http://homepage.mac.com/bogronlund/posterSSS4.pdf
For the 2002 Copenhagen exhibition 'Fields of urban research' - se 'The
informational City.....' at: http://www.karch.dk/udgivelser/publikationer/ShowPublication.asp?intPublicationID=88&strLanguage=UK
For the 1996 EgebjerggŒrd housing exhibition: http://hjem.get2net.dk/gronlund/BoibyUK.html
For the Nordic Journal of Architectural Research, 1993: http://hjem.get2net.dk/gronlund/Life_and_complexity.html
In Danish, the whole 2002 exhibition contribution with many more
illustrations is available at:
http://homepage.mac.com/bogronlund/BG_udstil_layout_400x200v3.pdf
A 2002 report in Danish on EgebjerggŒrd from the Danish Building
Research institute http://www.by-og-byg.dk/
is in .pdf format at: http://www.by-og-byg.dk/showfile.aspx?IdGuid={51ADFC28-85BD-4622-9A2A-9FDBB5F737DE}&CollectionId={8041B1F6-6ECB-43E8-AB1A-F345F7F2DFCE}
In Swedish there is also an illustrated paper on the issues of mixed
functions in the four areas from a Chalmer's Technical University 2002
conference: http://hjem.get2net.dk/gronlund/Blandstad_Chalmers_2002.pdf
[2] The H¿je TŒstrup averages are
deformed by the shopping mall and remaining unbuilt land.
[3] The shop opening hours for
supermarkets are still different in Denmark and Sweden, though, closing at
20:00 and 22:00 hours respectively. This still makes a difference for the
distributions of pedestrians in time and space.
[4] Se my lecture notes on new
urban theory developed by 'non-architects: http://hjem.get2net.dk/gronlund/3_314_Eng_v3_march2002.htm
[5] According to Tor N¿rretranders
[6] According to the Danish and
Swedish Statistical Bureaus, an urban areas has at least 200 inhabitants and a
maximum of 200 meters between houses. Concerning the notion of 'urbanity' this
makes no sense.
[7] 2 people, only, is not a
complex social situation - you can also say that 2 people concerns morality, 3
people and more concern ethics.
[8] These issues need to be
considered nor only in Scandinavia, but also in the US, where the movement for
'The New Urbanism' only partly have taken them into account - and then
basically at the artefact, low urbanity level.