What is a Pedestrian Operated Signal (POS)?
A Pedestrian Operated Signal (POS), also known as a push-button crossing signal, is a traffic control device that allows pedestrians to activate a signal for safe crossing across a roadway. It typically consists of a push-button mounted on a post alongside the crossing area. Pressing the button initiates a timed sequence, changing the traffic signal to red for vehicles and displaying a pedestrian crossing signal for safe passage.
How does a POS improve road safety?
POS systems enhance pedestrian safety in several ways:
Increased pedestrian visibility: Drivers are alerted to the presence of pedestrians waiting to cross when the activation signal is illuminated.
Pedestrian amenity: Pedestrians have control over the crossing signal, allowing them to conveniently initiate crossing at a safe time when vehicles are stopped
Reduced driver inattention: Drivers are less likely to miss pedestrians due to the activated signal and dedicated crossing time.
Improved traffic flow: POS systems can optimize signal timing based on pedestrian demand, potentially reducing overall waiting times.
Ideal use cases for a POS
POS systems are most effective in locations with:
High pedestrian traffic: Areas with high pedestrian traffic benefit the most from pedestrian-operated signals.
Limited visibility crossings: POS systems can compensate for poor visibility due to curves, hills, or obstructions.
Mid-block crossings: Locations away from intersections with existing traffic signals can benefit from POS for designated pedestrian crossings.
School zones and activity centres: Areas with increased levels of vulnerable pedestrians, such as children, elderly, and/or disabled pedestrians, should prioritise safe crossing opportunities.
Public transport routes: Areas which are along a public transport route, or close to a railway crossing with active control.
❗ Pedestrian-operated signals should not be used at locations where the speed limit is greater than 80 km/h.
Further guidance on POS installation can be found in Section 8 of AS1742.10-2009.
Cost and Crash Reduction Factor (CRF)
POS installations are generally considered a medium to high range cost treatment compared to other pedestrian safety measures.
Crash Reduction Factor (CRF): Studies suggest POS systems can achieve a CRF of 39% for pedestrian crashes, depending on factors like location and traffic volume.
Design notes
Road characteristics such as speed limit, number of traffic lanes, pedestrian storage space, path alignment, and path width should be considered when choosing an appropriate design for pedestrian-operated signals.
Detailed technical requirements for pedestrian-operated signals can be found in Section 8.2.7 of Austroads Guide to Road Design Part 4: Intersections and Crossings.
International Reference
Pedestrian Operated Signals (POS) is a global practice, also known as push-button or actuated signals. While the core function remains the same, specific designs vary. For instance, in the United Kingdom, POS may incorporate countdown timers for pedestrians, whereas standard push-buttons are more common in Singapore.
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