A post-construction audit of the improvements at the Shakespeare and Cook Street roundabout in
Cambridge shows the changes are slowing traffic down, improving safety for pedestrians and
cyclists.
However, it does highlight some areas where enhancements can be made to further improve safety.
The audit, undertaken by Safe System Solutions who also reviewed the design prior to construction,
said safety improvements observed included reduced speeds at the roundabout, slower turning
speeds and an improved shared path.
It confirmed the pedestrian crossing facility is in the desirable position, on balance of risk related to
the speed of approaching vehicles and where pedestrians are most likely to want to cross.
When it comes to the roundabout, the audit identified that while most vehicles - including a 22-
metre truck and trailer - can navigate the roundabout without touching the speed bumps, aspects of
the work could be improved.
Transport manager Bryan Hudson said there was a lot to consider, and the council will address the
recommendations, most of which were simple and low-cost tweaks.
“The short rubber bump spokes around the roundabout had defect issues and a few rubber ends
came loose because the bolts were too short. The contractor has fixed this defect by replacing some
of the bolts.
“Despite this issue, the design is working well, and speeds are lower in the intersection as a result of
the improvements. This helps drivers judge the gap to enter the intersection and pedestrians can
also better judge a gap to cross,” Hudson said.
Recommended additional safety improvements included changing lane markings at Cook Street on approach to the roundabout and reviewing signage.
The audit report will be presented at Tuesday’s Service Delivery Committee meeting. It can be read on our website below.
