Have Your Say on Roundabout Upgrade

The City of Mitcham undertook community consultation on proposed roundabout upgrades at the intersection of Sussex Terrace, Grange Road and Salisbury Crescent. 

The Sussex Terrace, Grange Road and Salisbury Crescent Roundabout has received a high number of road related incidents in the past five years. The City of Mitcham are committed towards implementing road safety improvements towards this intersection, with a total project budget of $145,000 funded 100% by the Australian Government through the Black Spot Program.

Council appreciates the invaluable feedback received from the community and has taken this into consideration as part of the design process. As you may understand, not all of the feedback received could be addressed at this time. However, Council wishes to provide information in response to the common themes raised by the community. These are summarised in the attached document.

Council is progressing through the detailed design phase of the project to produce documentation suitable for construction. It is anticipated that this project will be delivered before the end of the 2018/19 Financial Year. 

Consultation Feedback

What does this upgrade hope to achieve?

The City of Mitcham are committed towards implementing road safety improvements towards this intersection, with a total project budget of $145,000 funded 100% by the Australian Government through the Black Spot Program. The project aims to achieve significant road safety improvements for vulnerable road users and motorists through the;

Reconstruction of splitter islands which will provide safe pedestrian storage on all approach legs to the roundabout in the centre of the road. Pedestrians will only need to cross over one traffic lane instead of the two existing lanes on Grange Road, Sussex Terrace and Salisbury Crescent.

Construction of new median kerb islands and elongation of the roadside kerb will tighten the approaches, reducing vehicle speeds and deterring vehicles from overtaking vulnerable road users when entering the roundabout.

Reconstructing the centre annulus of the roundabout will provide delineation to motorists with new pavement markings and a semi mountable kerb for prevention of asset damage, whilst providing heavy vehicles and buses with improved negotiation of the roundabout.

Upgrade of pavement marking/signage will improve delineation and performance for motorists in adverse weather conditions. 

What is being done at this intersection to improve cyclist safety?

The crash history for the last five years identified a total of 22 crashes, most of which were right angle type crashes. Of these, six resulted in injury. Eight crashes in the last five years involved cyclists where the vehicle was at fault as it failed to give way to the cyclist. While this is a result of a lack of adherence by drivers to the Australian Road Rules, which state that a one metre gap must be provided between a vehicle and cyclist in a less than 60km/h zone.

Council has included road safety improvements and options to improve safety of vehicles and cyclists. This intersection has constraints that inhibit the ability to provide separation between cyclists and vehicles. In addition Council will create awareness of cyclists through the introduction of signage. 

Can Council look into lowering the speed limit on any of the approaches to the roundabout, or introduce any other devices to control speeds?

Following the concerns raised about speeding vehicles, Council undertook a further reviewed of the available traffic data. This data illustrated that vehicles were travelling within acceptable limits of the default urban speed limit of 50km/h. To reduce high approach speeds new median islands including the elongation of the roadside kerb will be constructed which will tighten the approaches, reducing vehicle speeds and deterring vehicles from overtaking vulnerable road users when entering the roundabout. 

The Power Line Pole located on the North Western approach to the roundabout is a problem, can Council remove it?

Council has conducted a road safety audit of the intersection during the detailed design phase for this project, the high voltage stobie pole located on the north western corner of the intersection was identified as a hazard.

Council acknowledges the concerns raised by the community regarding the dangers of having a stobie pole located so close to the kerb, however the difficulties associated with removing this is a substantial and costly process, which exceeds the current scope of the project and the federal grant funding. Council will undertake a review of the intersection following the completion of the project to assess the success of the upgrade and identify opportunities to upgrade the intersection in the future. This review will include options to reduce the hazard associated with the location of the stobie pole and identify funding opportunities.

Currently the roundabout is a problem for bus drivers, does this project consider the access for buses at this intersection?

Council consulted with the Department of Planning, Transport and Infrastructure’s Safety and Services Division who oversee the planning of future and current bus routes. Council is currently working through the feedback received by the Department of Planning, Transport and Infrastructure’s Safety and will ensure that this is taken into account during the design process. 

Can Council improve the line of sight for vehicles on the approach to this roundabout?

As part of the design process, a detailed design road safety audit of the upgrade was undertaken that identified potential hazards. Recommendations relating to sight distance have been included in the design by:

The sight distance from the Sussex Terrace (north) is restricted by fencing. The line where you wait to enter the roundabout will be shifted further north, and the kerb line on Grange Road will be shifted to the south to improve the line of sight. The risk will also reduce through the improved design to reduce vehicle speeds. Sight distance from the Grange Road (east) is restricted by fencing and vegetation within private property. This is unable to be changed however the risk is expected to be reduced through the design which will reduce vehicle speeds.

Unfortunately Council is limited in its ability to improve line of sight for vehicles due to the location constraints of the roundabout. Without moving the roundabout south of its current location, sight distance may only be improved by reducing vehicle speeds at this intersection.

Background 

The Australian Government has committed to providing $744.5 million to the Black Spot Program from the 2013/2014 financial year through to the 2021/2022 financial year. In recognition of road crashes constituting major costs to Australians each year, the Black Spot Program has been established to reduce crashes by the identification and treatment of intersections and sections of road that have an unsatisfactory casualty crash record or that have significant crash potential.  

The roundabout at Sussex Terrace, Grange Road and Salisbury Crescent has suffered from a number of right angle crashes involving both cyclist and motor vehicles. In 2015, Council implemented a kerb protuberance on the southern leg of the intersection to reduce vehicle approach speeds. Since this treatment has been implemented the frequency of crashes has reduced, however the crash severity has remained consistent. 

This has indicated to Council that further road safety improvements should be undertaken at this intersection which has been shown to have one of the highest casualty rates for cyclists in the State. 

How many crashes have there been?

Crash data for the five years from 2012-2017 identified a total of 22 crashes, most of which were right angle type crashes. Of these six resulted in injury. 

What does this upgrade hope to achieve?

The project aims to achieve significant road safety improvements for vulnerable road users and motorists through the;

  • Reconstruction of splitter islands which will provide safe pedestrian storage on all approach legs to the roundabout in the centre of the road. Pedestrians will only need to cross over one traffic lane instead of the two existing lanes on Grange Road, Sussex Terrace and Salisbury Crescent.
  • Construction of new median kerb islands and elongation of the roadside kerb will tighten the approaches, reducing vehicle speeds and deterring vehicles from overtaking vulnerable road users when entering the roundabout.
  • Reconstructing the centre annulus of the roundabout will provide delineation to motorists with new pavement markings and a semi mountable kerb for prevention of asset damage, whilst providing heavy vehicles with improved negotiation of the roundabout.
  • Upgrade of pavement marking/signage for improved delineation and performance for motorists in adverse weather conditions.

Concept Plans for the Sussex Terrace, Grange Road and Salisbury Crescent Roundabout Upgrade

When will this project commence?

Subject to the feedback received, Council anticipates the commencement of construction on the proposed roundabout upgrade to occur between April and June 2019. 

Council will ensure that all efforts are made to minimise any inconveniences to residents and commuters during the construction period and will provide advance notice of any impacts to transport amenity. 

if you require further information please contact James Arnold from the Traffic and Transport Team on 8372 8888 or via email mitcham@mitchamcouncil.sa.gov.au

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