Transport Canberra and City Services

Positive and negative impacts of each of the proposed treatment measures and their indicative costs

Traffic Calming Device / Cost



Linemarking with kerb extensions

$100,000 - $110,000

- Can give the impression of a more confined road and result in reduced speeds.
- Relatively low cost.
- Create a safer interface between driveways and road users.
- Speed reduction is generally low.
- Drivers may mistake an empty kerb-side lane as a traffic lane.


$50,000 per set

- Reduce vehicle speeds.
- Discourage 'rat running'.
- Aesthetically pleasing.
- When used to narrow the carriageway provide a shorter crossing distance for pedestrians.
- Relatively expensive.
- Can make access to adjacent residences more difficult.
- May not reduce motorcycle speeds.

Speed cushions

$15,000 per set

- Reduction in vehicle speeds in the vicinity of the speed cushions.
- When used as a series reduces the overall speed over the entire length of street.
- Relatively low cost to install and maintain.
- Can be designed to minimise inconvenience for buses and emergency services vehicles.
- Traffic noise may slightly increase just before and after the speed cushions.
- Less effective in slowing motorcyclists.
- Less effective in slowing vehicles with a wider track.

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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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