Just imagine a bicycle traffic jam on the new Disraeli Bike / Pedestrian Bridge.
Check out the new Streetfilms video on the Hawthorne Bridge in Portland, Oregon.
http://www.streetfilms.org/archives/portland-bike-rush-hour-on-the-hawthorne-bridge/
7000 + bicycle crossings per day
20% of the traffic on the bridge
less than 10% of the space
David Wieser