My Vasona Branch layout is a double-decked model railroad. The levels are connected with a one-and-a-half turn helix; the track plan has staging tracks at the bottom and top.

Lower level, including San Jose staging, West San Jose, Campbell, and Los Gatos:
page19_0_1

Upper level, including Alma, Wrights, Glenwood, and Santa Cruz staging:

page19_1_1