What are angled slow points?

An angled slow point is created by installing kerb extensions on opposite sides of a roadway to narrow and angle path of traffic. Slow points are intended to reduce vehicle speeds. Drivers are expected to reduce speed to negotiate the lateral displacement at the slow point. Driver who is closer to the slow point has right of way through the device.

Why does this proposal need two slow points?

Alleyne Street between Mann Street and Victoria Avenue is approx. 250m long. A roundabout is located on the northern end and the intersection on the southern end is Give-Way controlled. If one slow point was provided half-way in the street, speeding could still occur as vehicles would slow down only when they are closer to the device. 

Will this proposal create noise?

The slow points are unlikely to make much noise. Adequate warning signage about the devices will be installed which allows adequate time for approaching traffic to slow down. 

What are the benefits of the proposal?

As this proposal provides a series of traffic calming devices; roundabout at Mann Street, Slow points and a Give-Way control intersection, speeds will be reduced over the length of the street.

Research indicates a considerable drop in the approaching speed of traffic. These devices have been installed in many locations in Willoughby area and they have been effective in reducing speeds in those residential streets.

Traffic calming devices also reduce through traffic volumes. 

In comparison to speed humps which are also an effective device to control speeding, the noise impact from slow points is minimal.

What are the disadvantages of the proposal?

They could restrict large vehicle movements depending on the length and manoeuvrability of the vehicle. 

The single lane through the slow point may cause some confrontations between opposing drivers if they arrive simultaneously. However, local traffic generally manages without much confrontation.

The proposal requires removal of two parking spaces for the installation of slow points.

What are the impacts on on-street parking?

The proposed slow-points require removal of two parking spaces at the following locations of Alleyne Street:

  • One space on the western side, outside No.12
  • One space on the western side, outside No.26

Will the traffic calming devices block our driveway?

No driveways will be impacted.

Why can’t speed cameras or increased police presence be used to slow traffic?

Enforcement by speed cameras or police presence is only effective at the point and/or time of operation. In contrast, traffic calming measures provide continuous all-day speed control to most vehicles using the street, and are therefore effective on a 24/7 basis.

What is the speed through a slow-point?

The advisory speed limit through a single-lane slow point is 25km/h.

Why has this type of traffic calming device chosen?

The residents have already indicated that speed humps are not preferred in Alleyne Street due to potential noise. Therefore, the traffic calming devices that provides only horizontal deflection were considered and angled single-lane slow points were considered more appropriate for Alleyne Street to lower the current speed profile to at or below the speed limit of 50km/h.