Transport Canberra and City Services


Chisholm, Richardson and Gilmore traffic study - updated August 2015

Project background

The residents of Clift Crescent, Heagney Crescent and Hambidge Crescent and other road users have written to Ministers, members of the ACT Legislative Assembly and Roads ACT regarding their concerns about traffic volumes, speeding and other road safety and amenity issues on these streets.

Roads ACT has developed the Traffic Warrant System (TWS) to identify the need for traffic management and road safety measures on residential streets. This system takes into consideration the total traffic volume, traffic speed, crash history and land use of each street to provide a ranking. Clift Crescent, Heagney Crescent and Hambidge Crescent ranked relatively high on the 2009 TWS.

On 2 May 2012 a motion was passed in the ACT Legislative Assembly calling on the ACT Government to consult and initiate traffic calming measures on Clift Crescent.

Stage 1 Community consultation/feedback

In November/December 2012, Roads ACT collected feedback about issues of concern from residents of Chisholm, Richardson, Gilmore and the wider community.

The feedback received included 222 hardcopy survey responses and 16 online submissions. Ten people also attended an information session at the Caroline Chisholm School on 29 November 2012.

Key areas of concern raised by the community included speeding, dangerous intersections and 'rat running' through the suburbs.

The concerns identified as requiring immediate solutions were speeding and excessive traffic volumes.

Results of technical analysis of traffic data

The technical analysis of traffic data showed that 85th percentile speeds* are above the speed limit on Goldstein Crescent (near Isabella Drive), Beattie Crescent, Heagney Crescent, Hambidge Crescent and Clift Crescent (near Johnson Drive).

Traffic volumes on Goldstein Crescent (near Heagney Crescent) and Hambidge Crescent (near Isabella Drive) also exceed the desirable limits for the road environment.

(*the speed at which 85% of the surveyed traffic is travelling at or below)

Proposed traffic management treatments

A traffic management scheme was developed to improve traffic conditions on Clift Crescent, Heagney Crescent and Hambidge Crescent, as well as issues on surrounding streets identified during the analysis of traffic data and from community feedback.

The objectives of this scheme were to:

  • reduce travelling speeds
  • improve safety at intersections
  • reduce traffic volumes
  • discourage 'rat-running'.

The technical principles behind this scheme were:

  • to reduce speeds all-day every day (24/7), it is necessary to place physical devices on the road so that motorists must slow down.
  • devices must be spaced evenly along the road to achieve the desired travel speed at, or below, the posted/default speed limit.
  • different devices serve different purposes, have different levels of effectiveness, and vary in construction cost. However, the aim of all these devices is to reduce speeding and encourage through-traffic to use the surrounding arterial roads.
  • slower speeds and devices which create safer crossing opportunities for pedestrians would also help to improve the safety and amenity of residents.

For more information view a summary of the proposed treatments.

Stage 2 Community consultation/feedback

The community was consulted again in March/April 2013 to seek views on the proposed treatments for improvement.

The feedback received included 202 hardcopy responses and 89 online submissions. Forty people also attended the public display/information session at the Caroline Chisholm School on 14 March 2013.

This feedback included:

  • 73% of respondents supported the proposed scheme
  • 38% of respondents supported the scheme 'as is'
  • 35% of respondents supported the scheme and suggested changes to some of the proposed treatments
  • 35% of respondents nominated Clift Crescent as the priority street for treatments
  • The Clift Crescent/Ashley Drive intersection was identified as a high priority issue. However, this intersection will be further investigated as part of the Ashley Drive duplication project under future capital works programs.

Final master plan

In view of the results of the technical analysis and the feedback received from the community, and considering the technical effectiveness of the proposed treatments, the final scheme has been modified and now incorporates some alternative treatments suggested and supported by the community.

It is important to note that the final scheme is an overall 'master plan' for the area and that not all proposed devices will be installed at once. The master plan will guide the implementation of the scheme over a number of years due to annual budgetary constraints.

For information on the master plan View a PDF of the final scheme for implementation (please note: this map contains elements which cannot be made accessible. If you are experiencing difficulty accessing the information in this map please contact 13 22 81 to request a hard copy).

Priorities and staging

Priorities have been assigned to the proposed treatments based on the results of the technical analysis and feedback from the community.

The priority 1 treatments are:

  • speed cushions on Clift Crescent
  • raised platforms on Kiddle Crescent
  • speed cushions on Baskerville Street.

Some of these priority 1 treatments were implemented in mid-2014.

View a map of the implemented Chisholm, Richardson and Gilmore traffic management scheme*.

*Please note this document contains elements which cannot be made accessible. If you are unable to access the information in this plan, please contact 13 22 81 to request a hard copy.

Evaluation of effectiveness

In early 2015, six months after the implementation of the priority 1 measures, the Chisholm, Richardson and Gilmore traffic management scheme was evaluated to determine if the measures in place had achieved the stated objectives of reducing travelling speeds and increasing overall road safety.

The technical evaluation included a 'before' and 'after' comparison of traffic speed, volume and crashes. Community feedback was also sought regarding the effectiveness of the treatments, and a total of 339 responses were received. The key findings from the overall analysis are outlined below.

Clift Crescent

  • Travelling speeds have been reduced by between 5.8 km/h – 16.5 km/h and are now within acceptable limits.
  • Traffic volumes have been reduced by 24 – 33%.
  • About 45% of Clift Crescent respondents are supportive (with 10% unsure) of the measures implemented on Clift Crescent.
  • About 38% of all respondents are supportive (with 9% unsure) of the measures implemented on Clift Crescent.

Baskerville Street

  • Travelling speeds have been reduced by up to 8.0 km/h. However, the current speeds still exceed the 50 km/h speed limit of the street.
  • Traffic volumes have been reduced by about 39%.
  • About 50% of Baskerville Street respondents are supportive (with 8% unsure) of the measures implemented on Baskerville Street.
  • About 26% of all respondents are supportive (with 25% unsure) of the measures implemented on Baskerville Street.

Traffic conditions on other streets

  • Traffic speeds on Heagney Crescent, Hambidge Crescent, Goldstein Crescent, Beattie Crescent and Norriss Street have been marginally reduced; however, the current speeds continue to remain above the legal speed limit of the streets.
  • Traffic speeds on Deamer Crescent have increased, with 85% of the surveyed traffic travelling at or below 72.4 km/h on a 50 km/h street. 
  • Traffic volumes have increased on Hambidge Crescent, Norriss Street, Beattie Crescent and Deamer Crescent. However, the current volumes are still within the environmental capacity and acceptable limit of these roads.

Given the overall technical success of the implemented scheme, the implemented measures on Clift Crescent and Baskerville Street will be retained. Traffic conditions on Heagney Crescent, Hambidge Crescent, Goldstein Crescent, Beattie Crescent, Deamer Crescent, Norriss Street and Proctor Street will continue to be monitored. Any further improvements, if required, will be considered in future programs, when funding becomes available, in consultation with residents of the respective streets.

The ACT Government is committed to improving the accessibility of web content. To provide feedback or request an accessible version of a document please contact us or phone 13 22 81.

We acknowledge the Traditional Custodians of the ACT, the Ngunnawal people. We acknowledge and respect their continuing culture and the contribution they make to the life of this city and this region.

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