Transport Canberra and City Services


Maribyrnong Avenue, Kaleen - July 2016

Maribyrnong Avenue, Kaleen traffic study - updated July 2016

Project background

The residents of Maribyrnong Avenue 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 this street.

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 for collector roads. Maribyrnong Avenue in Kaleen ranked relatively high on the 2013 TWS.

Stage 1 Community consultation/feedback

In September/October 2013 Roads ACT collected feedback about issues of concern from residents of Kaleen, Giralang and the wider community.

The feedback received included 555 survey responses and three email/phone submissions, with 299 people attending the information sessions.

Key areas of concern included:

  • speeding (64% of respondents), particularly on Onkaparinga Crescent, Ashburton Circuit, Baldwin Drive and in the school zone on Maribyrnong Avenue between Kaleen Primary and St Michael's Primary
  • intersection safety (47% of respondents), particularly at the intersections of Maribyrnong Avenue/Ashburton Circuit, Maribyrnong Avenue/Daintree Crescent, Maribyrnong Avenue/Ellenborough Street and Daintree Crescent/Ellenborough Street
  • peak hour congestion issues (33% of respondents), particularly at the intersections of Maribyrnong Avenue/Daintree Crescent, Maribyrnong Avenue/Ashburton Circuit and Maribyrnong Avenue/Onkaparinga Crescent (east)
  • pedestrian safety (35% of respondents), especially across Maribyrnong Avenue and Ellenborough Street.

Speeding, intersection safety and pedestrian safety were identified as requiring immediate solutions.

Comments received also indicated that there is general support for the introduction of traffic management measures on Maribyrnong Avenue and surrounding streets.  For more information view the Summary of the Maribyrnong Avenue Stage 1 consultation responses (Word 118KB) (PDF 287KB)

Technical analysis

The technical analyses of traffic speed, volumes and crashes showed that:

  • there is a degree of speeding  throughout the suburb, with the 85th percentile speeds* in excess of the speed limit on many streets including:
    • Baldwin Drive (78 km/h in a 60 km/h zone)
    • Maribyrnong Avenue (67km/h in a 60 km/h zone)
    • Ellenborough Street (68km/h in a 60 km/h zone)
    • Daintree Crescent  (61km/h in a 50 km/h zone)
    • Diamantina Crescent  (61km/h in a 50 km/h zone)
    • Onkaparinga Crescent   (63km/h in a 50 km/h zone)
  • traffic volumes are moderately high on Maribyrnong Avenue (7,200 - 8,200 vehicles per day) and Ellenborough Street (9,800 vehicles per day)
  • crash frequencies are relatively low throughout the suburb of Kaleen.  However, the Maribyrnong intersections with Daintree Crescent (6 crashes), Ellenborough Street (16 crashes), Ashburton Circuit (9 crashes), Onkaparinga Crescent (6 crashes at both intersections) and Georgina Crescent east (8 crashes) have experienced the most crashes in the last five years.  Some of these crashes have resulted in injuries; no fatalities have been recorded in Kaleen in the last five years.

*The speeds at which 85% of the surveyed traffic is travelling at or below.

Proposed traffic management treatments

Potential traffic management treatments were developed to address the feedback received from the community as well as the results of the technical analyses of traffic data.

The objectives of the proposed scheme were to:

  • reduce travelling speeds
  • improve safety at intersections
  • improve pedestrian safety.

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.

The Kaleen concept plan (PDF 1MB) shows the proposed scheme*.

*This concept plan shows a map of the proposed treatments.  If you are unable to access the information in this map please contact Access Canberra on 13 22 81 to request an alternate version.

For more information on the proposed treatments view a summary of the proposed treatments.

Stage 2 Community consultation/feedback

The community was consulted again in December 2013/January 2014 to seek views on the proposed treatments for improvement.

Over 480 people participated in this consultation process. The feedback received included 282 survey responses, 13 phone/email submissions and 193 people attended the public display/information sessions.

This feedback included:

  • majority support for the proposed traffic management scheme (58% of respondents)
  • strong preference for an extension of the 60km/h zone on Baldwin Drive
  • support for pedestrian refuges on Maribyrnong Avenue, especially near schools and bus stops
  • support for installation of speed cushions on Onkaparinga Crescent, especially by residents of  Onkaparinga Crescent
  • support for improving pedestrian access to Kaleen Plaza (Georgina Crescent)
  • support for improving pedestrian and cyclist access and visibility at the Maribyrnong Avenue/Ellenborough Street roundabout
  • support for treatments to reduce congestion at the Maribyrnong Avenue/Ashburton Circuit intersection.

The community was generally not supportive of lane narrowing on Maribyrnong Avenue and the proposed roundabout at the Maribyrnong Avenue/Diamantina Crescent intersection.

For more information view a summary of the Maribyrnong Avenue Stage 2 consultation responses (Word 125KB) (PDF 326KB).

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. It 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. The works will be undertaken as funding becomes available.

The locations of proposed treatments shown on the map are indicative only, and the exact locations, as well as the detailed design of treatments, will be determined before the implementation stage.

The Kaleen master plan (PDF 1MB) shows the final scheme*.

*This plan shows a map of the final scheme for improvements. If you are unable to access the information in this map please contact Access Canberra on 13 22 81 to request an alternate version.

Priorities and staging

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

An evaluation of the effectiveness of Priority 1 treatments will take place six months after their implementation. The evaluation will include a technical analysis of the scheme's impacts and the residents' views of the extent to which the stated objectives were achieved. Further implementation of Priority 2 and 3 treatments will depend on the results of this evaluation.

For more information view the Kaleen Priority 1 treatments* (PDF 1MB).

*This plan shows a map of the Priority 1 treatments. If you are unable to access the information in this map please contact Access Canberra on 13 22 81 to request an alternate version.

The Priority 1 treatments are summarised below.

Maribyrnong Avenue

  • Raised pedestrian crossing between the two 'legs' of Georgina Crescent.
  • Pedestrian refuge between the two 'legs' of Onkaparinga Crescent.
  • Pedestrian refuge near the northern 'leg' of Yarra Street.
  • Channelised right turn into Tyrell Circuit.
  • Roundabout at Ashburton Circuit.
  • Modifications to roundabout at Ellenborough Street.
  • Pedestrian refuge between Baldwin Drive and Diamantina Crescent.

Baldwin Drive

  • Extend the existing 60km/h zone.

Daintree Crescent

  • Speed cushion near Pambula Street (west).

Ellenborough Street

  • Pedestrian refuge between Maribyrnong Avenue and Daintree Crescent.

Onkaparinga Crescent

  • Speed cushion between Callabonna Street and Spigl Street.
  • Speed cushion between Burnett Street and Nambucca Street.

For more information on the final scheme and the priorities for implementation view the Executive Summary of the Maribyrnong Avenue report (Word 95KB) (PDF 968KB).

Evaluation of the effectiveness of the Implemented Scheme

The implementation of Priority 1 treatments in the area was completed in July 2015.

The objectives of the Priority 1 treatments are to:

  • Reduce travelling speeds on Ellenborough Street, Daintree Crescent and Onkaparinga Crescent.
  • Improve pedestrian safety on Maribyrnong Avenue and Ellenborough Street.
  • Improve road safety at the Maribyrnong Avenue intersections with Ellenborough Street and Tyrrell Circuit.

The recommended roundabout at the Maribyrnong Avenue/Ashburton Circuit intersection was not implemented as it was not possible to provide the necessary deflection required to control vehicular speeds nor satisfy the turning movements of a 14.5m tag steer bus without pavement widening and relocation of existing services. The high costs of the necessary pavement widening and relocation of services was also beyond the current funding allocation. As such, improvements to this intersection will be considered under future capital works programs when adequate funding becomes available.

The effectiveness of the implemented priority 1 measures was evaluated in early 2016 to determine if they 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 364 responses were received. The key findings from the evaluation are outlined below.

Technical analyses:

  • Travelling speeds have been reduced on Maribyrnong Avenue, Ellenborough Street, Daintree Crescent and Onkaparinga Crescent by up to 1.9 km/h, 2.4 km/h, 1.4 km/h and 3.9 km/h respectively.
  • Traffic volumes on many Kaleen streets have changed marginally. The level of change is within the normal variations expected on such streets.
  • The speeds on Staaten Crescent and Ashburton Circuit continue to remain above the legal speed limit of the streets.

Community feedback:

  • About 72% of all respondents and 73% of Maribyrnong Avenue respondents are supportive of the measures implemented on Maribyrnong Avenue.
  • About 75% of all respondents are supportive of the measures implemented on Ellenborough Street.
  • About 43% of all respondents (43% were unsure) and 70% of Daintree Crescent respondents are supportive of the measures implemented on Daintree Crescent.
  • About 49% of all respondents (31% were unsure) and 63% of Onkaparinga Crescent respondents are supportive of the measures implemented on Onkaparinga Crescent.
  • The majority of respondents felt that the implemented measures have improved the overall level of road safety on Maribyrnong Avenue and Ellenborough Street but was unsure of the impacts on Daintree Crescent and Onkaparinga Crescent.
  • About 18% of respondents felt that traffic impacts are now being experienced on other streets in the area, with traffic volumes and speeds on Staaten Crescent, Alberga Street and Ashburton Circuit being their major concern. The majority of these respondents also supported the implementation of traffic calming measures on these streets.
  • About 93% of the respondents were ‘satisfied’ or ‘very satisfied’ with the consultation process.

Traffic conditions on Maribyrnong Avenue, Daintree Crescent, Onkaparinga Crescent, Staaten Crescent, Alberga Street and Ashburton Circuit will continue to be monitored. Any changes to the existing traffic management scheme or implementation of other treatments 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.

Bookmark and Share

Feedback | Languages | Sitemap | Jobs ACT | Privacy | Disclaimer | Copyright Page last updated on 20 September 2016