Without space and time to get through the intersection itself, bike riders are left to share space with motor vehicles which may increase the risk of crash or conflict.
Choosing and designing an appropriate intersection to accommodate people cycling requires careful consideration of a number of factors such as the type of facility between intersectionsand the target users of the facility.
The key planning principles for accommodating cyclists at intersections are outlined in Planning a cycle network or route.
If time is not provided for bike riders at signalised intersections such as signal phasing or length of green time, then bike riders may not be able to clear the intersection before cross traffic starts to move and potentially be hit by vehicles from the left or right.
More generally, signalised intersections are high stress areas for potential bike riders.
If space and time are not provided then intersections act as barriers to riding and many potential riders may avoid the intersection or avoid riding altogether if the alternative route is too long, stressful or non existent.
Consider bike riding in all stages of intersection design.
Axel is an accredited trainer for the SIDRA INTERSECTION software.
He also teaches the Planning and Design for Cycling courses, which have been taught to over 1,200 individuals since 2003.
Bicycles, just like any other vehicle, need space and time at signalised intersections but are often squeezed out.
Space for bikes should be provided at all six stages of an intersection - midblock; approach; transition; storage; through; and departure.
Axel holds an ME (Civil) from Canterbury University and has been active as a traffic engineer and transport planner in New Zealand since 1998, with some prior experience in Germany.