Extending Clearway Times
The government is responsible for maintaining an efficient, smooth, reliable and safe transport network on Adelaide's roads to meet the state's transport, economic and social needs.
Where some arterial roads also serve as access points to local business and residences the application of traffic management tools used to improve traffic flows needs to be balanced with the need to offer access for local communities and businesses.
Traffic volumes on metropolitan Adelaide arterial roads have increased by approximately 20% since 1997. Extending the operating hours of parking restrictions (clearways and bicycle lanes) is an effective traffic management measure to improve traffic flows on highly congested arterial roads.
An early initiative launched as part of the announcement of the Operation Moving Traffic report, was a pilot to extend the operating hours of parking restrictions (clearways and bicycle lanes) on Greenhill Road between Anzac Highway and Glynburn Road. The purpose of this pilot was to offer a gradual and staged approach to tackling Adelaide’s peak period congestion problem and improve road safety.
Evaluation of Bluetooth data over the last 12 months shows a 1 minute travel time improvement on Greenhill Road between Devereux Road and Anzac Highway heading west and 40 seconds improvement for east bound. Comparing the traffic volume in 2017 versus 2016 shows a further 4% increase in traffic volume during the extended clearway period. The travel time improvements will benefit an average of 14 000 vehicles per day during the additional clearway times of 9.00 am – 10.00 am, 3.00 pm – 4.00 pm and 6.00 pm – 7.00 pm.
Following the success achieved with the changes made to Greenhill Road, extension of Clearway operating times is now proposed for the following locations:
- Glen Osmond Road
Greenhill Road to Portrush Road (7:00 am – 10:00 am city bound and 3:00 pm – 7:00 pm out bound - Monday to Friday).
- Fullarton Road
Britannia roundabout to Greenhill Road - 24 hour Clearway (at all times), Glen Osmond Road to Carrick Hill Road - 7:00 am – 10:00 am city bound and 3:00 pm – 7:00 pm out bound - Monday to Friday).
- Main North Road
Fitzroy Terrace to Nottage Terrace (7:00am -10:00am inbound and 3:00pm – 7:00pm outbound – Monday to Friday)
To tackle traffic congestion and improve road safety on major arterial roads the Department of Planning, Transport and infrastructure proposes to extend the operating hours of parking restrictions (clearways and bicycle lanes).
The new hours of operation will improve traffic flow and reduce hold-ups on the busiest roads during the busiest periods of the day. This is where most congestion occurs and affects the largest number of people.
The new hours of operation for clearways ensure the most effective use of limited arterial road space and supports the objectives of Operation Moving Traffic as well as the growth targets in the 30 year plan for Greater Adelaide and contributes to a more vibrant city.
All OMT initiatives are about moving people and goods safely and efficiently, to meet the community’s transport, economic and social needs.
Keep an eye on this page for updates on further proposed locations for extension of clearways times.
Statistics and Benefits
The primary benefit of implementing a clearway strategy on an arterial road would be gaining extra lane capacity. This extra lane capacity will be critical for peak period traffic operation. The benefit would be significant when compared to the loss of kerb-side parking.
Clearways also provide for smoother and safer traffic flow, which result in the following benefits:
- Improved bus and freight traffic flow, as the need to weave around parked vehicles is eliminated. The need for freight to travel in the median lane (due to parked vehicles) will also be reduced.
- A more even distribution of vehicles over the traffic lanes and less lane changing, which can lead to consistent speeds along a route. From the “National Greenhouse Strategy”, Part 5.6 Traffic Management, states, “…an aim of reducing emissions from motor vehicles by achieving travel at more consistent speeds, especially for high volume routes”.
- From the findings of the Federal Office of Road Safety, the accident reductions that can be expected are: 20% for rear end accidents, 50% for hit parked/parking vehicles, and 30% for vehicle hits pedestrian type accidents (by the absence of parked vehicles which hide pedestrians).
- Route capacity and average travel speeds are improved due to SCATS linking and intersection ‘green bands’ can be adjusted for faster progression of more compact platoons of vehicles.
- Improved access to the arterial road system from local roads, as sight distances will be improved and the traffic platoons will be shorter, thereby allowing easier access. Improvements to the arterial road system encourage motorists to travel along those roads, instead of bypassing areas of congestion by utilising the local road network.
- Improved cycling environment, as cyclists need not weave around parked vehicles
How you can get involved
For more information, news and updates, and to find out how you can provide your feedback about Operation Moving Traffic: