Consultation status: closed 14 February 2017
We are proposing the following changes:
- A raised speed table over the intersection.
- Removal of the left-turn slip lane from Chartwell Avenue into Bentley Avenue, and the removal of the associated refuge island.
- Two pairs of pram crossings with tactile pavers.
- Kerb build-outs around corners of the intersection.
- Five new parking spaces on Chartwell Avenue.
- New road markings and road signs.
Why the changes are required
Previously, a roundabout was proposed in this location and consulted upon. We are now seeking feedback on a new proposal that is designed to minimise the number of injury collisions occurring at the intersection.
The crash history of this intersection confirms a crash issue exists for vehicles turning into Bentley Avenue from Chartwell Avenue. The current give-way controls indicate that vehicles turning left into Bentley Avenue must give-way.
This can be confusing as it is contrary to the give-way rules at most intersections, where right-turning drivers must give way.
In addition, the raised speed table and kerb build-out will together act as speed-calming measures, while also reducing the crossing distance on the pram crossings.
These improvements aim to make the road and footpath environment safe as part of our coordinated plan to develop safer road layouts, promote sustainable travel and ensure ease of passage for those travelling on foot. As part of these improvements, we will also upgrade any sub-standard street lighting as and when required.
Thank you everyone for your feedback.
The proposal received positive feedback with some concerns raised by respondents.
After reviewing this feedback and all other supporting evidence, the proposal will proceed with the following changes to the next stage of detailed planning:
- We will investigate the inclusion of cycle facilities at the intersection. This will be investigated during the detail design stage. If a cycle lane is included, this will result in no gain in parking spaces on Chartwell Avenue next to this intersection (i.e. the parking situation would remain as it is currently).
Specific feedback and proposed solution
- Concern that removing the left turning slip lane will cause congestion. We have undertaken traffic modelling of the intersection. The modelling demonstrates that traffic still flows with a slight increase in the queue and delays vehicles turning right from Chartwell Avenue into Bentley Avenue. While there will be a slight delay, the new lane arrangement will result in a significant reduction in crash risk.
- Concern that the kerb buildout will result in queues forming down Bentley Avenue. Traffic modelling has also shown that there will be a slight increase to the existing queue length on Bentley Avenue. However, this will not significantly affect traffic flow at the intersection.
- Request for a roundabout instead. As a result of further investigation, the raised speed table was selected over the roundabout option to target the existing crashes occurring at this location. While the roundabout would address the current crash problem by completely changing the form of the intersection, it would also introduce new crash types, such as rear-end collisions. For cyclists and pedestrians, the roundabout option would result in a lower level of service and we could also see an increase in cyclist crashes. Furthermore, the previously proposed roundabout was mountable in order to assist buses and larger vehicles. This allowed all vehicles to drive over it, thereby reducing its effectiveness as a roundabout to reduce speed.
- Concern that this particular proposal won't improve the rate of accidents. The improvements of the raised speed table and kerb buildout directly address the crashes occurring at this intersection, and also provide the opportunity to improve the pedestrian crossing facilities.
- Concern about the positioning of the pram crossings, and requests for two pedestrian crossings in Chartwell Avenue or over the pram crossings. The locations of the proposed pram crossings were selected as a result of the pedestrian desire line (where people are already crossing), the locations of driveways, and the location of the proposed speed table. The pram crossings are located on top of the speed table as vehicles will slow down at this intersection. Pedestrian zebra crossings would not be appropriate in this situation.
- Request to extend the No stopping at all times restrictions (broken yellow lines) on Chartwell Avenue. There are currently extensive No stopping at all times restrictions on Chartwell Avenue. Parking spaces are provided where there is an opportunity to do so without affecting the safety or operation of the intersection.
- Request for additional works including longer phasing of traffic lights. This request is outside the scope of this proposal. If you would like your request to be considered by AT for future development works, please provide feedback on our website.
We expect to introduce this work starting in July 2017 and throughout 2017/2018, subject to any further changes in design or funding issues. Contractors will issue a 48-hour notice to all residents in the area prior to starting construction work.