The benefits of lower vehicle speeds are regularly reported in terms of safety, particularly for vulnerable road users, where the relationship between impact speed (velocity) and survivability is generally well-established, as noted previously . Less often reported are the environmental impacts of lower speeds, including reduced vehicle emissions and fuel consumption, which may be expected in many cases where speed reduction measures are implemented. With research on this top

As reported in a previous brief on smart traffic management technology, variable speed limits (VSL) have been shown to significantly reduce crash rates while simultaneously improving traffic flow, particularly in congestion scenarios. VSL adjusts speed limits in real-time based on triggers such incidents, adverse weather and congestion, producing crash reductions of up to 34% according to some studies 1 . Smart motorways with VSL systems are increasing in number across Austr

As reported in our previous brief on intersections (Part 1) , red light running is a major factor contributing to intersection crashes, which account for approximately 45% of all reported casualty crashes in Victoria and NSW[1]. At signalised intersections, the yellow change interval between green and red lights is critical and should allow drivers to stop safely (sufficient interval) without encouraging them to enter the intersection during the transition phase (excessive in

In Victoria, the Road Safety (Traffic Management) Regulations prescribe requirements for the authorisation of traffic control devices, including speed limit signs. Speed limit sign sizes are categorised by codes ranging from A (smallest) to E (largest). Selection of the appropriate sign size is determined by the applicable speed zone, where sign sizes generally increase with speed limits. Various environmental and traffic conditions may warrant variations, such as, for exampl

The relationship between vehicle speeds, crash risk, and injury severity is well known and is a key topic that continues to be examined heavily in road safety research. Generally, both crash risk and injury severity risk increase with higher speeds. This is a fundamental driver of various efforts to reduce speeds and speeding through a combination of engineering, enforcement, education and regulatory measures. The benefits of speed reduction measures may be crudely estimated

Source: https://www.parliament.vic.gov.au/news/society/traffic-cameras/ Enforcement of speed limits using camera technology and other means, and the associated penalties, is one of the more controversial road safety topics in public forums. An Australian study using self-reported data from a large sample of drivers (N=5179) found high levels of acceptance of low-range speeding[1]. According to this study, the extent of speeding tends to increase in higher speed zones, with 48