In the past three years there has been one fatality and 257 people injured in speed related crashes in Slough’s residential areas. Many of these were pedestrians, cyclists and children.
Slough Borough Council believes that reducing the speed of traffic in residential areas will reduce the frequency and severity of collisions, reduce congestion, discourage rat-running and make Slough’s communities safer for residents.
20mph zones reduce accidents by an average of 60% (TRL report 215, 1996). In London a review of 78 sites found that they reduced injury accidents by about 42% and fatal or serious accidents by 53%.
On average, for every 1mph speed reduction, there is a 6.2% accident reduction.
A pedestrian hit by a car, travelling at a lower speed is much more likely to survive.
If a child runs out three car lengths ahead, when you are travelling at 20mph, you should just be able to stop in time. But at 30mph, you will hit the child, with a significant chance of injuring or killing them.
|45% of pedestrians are killed||5% of pedestrians are killed|
An initial borough wide cluster analysis of pedestrian, cycle and speed related accidents were carried out to create a shortlist of areas to be considered for 20mph zones. Areas around schools and elderly residential sites were prioritised.
Seven zones were identified from this analysis as being suitable for inclusion in a 20 zone or as needing improvements to existing zones. These are:
There is a significant difference between the characteristics of a 20mph speed limit and a 20mph zone.
There are four main techniques to traffic calming programmes:
Thames Valley Police have a commitment to enforcing the law and therefore, will be enforcing all speed limits.
In a recent consultation, the Department for Transport set out plans to "encourage highway authorities to introduce, over time, 20 mph zones or limits into streets which are primarily residential in nature and into town or city streets where pedestrian and cyclist movements are high, such as around schools, shops, markets, playgrounds and other areas, where these are not part of any major through route".
DfT Circular 01/2006 which encourages and supports Local Authorities to implement 20 mph limits and zones in situations where there is a particular risk to vulnerable road users.
To add the financial context, the cost to society of injuring different types of casualties is summarised in the table below. As well as the council’s commitment to make Slough’s roads safer for all, this valuation also lends weight to the importance of addressing locations where there is a clear need to protect vulnerable road users.
|Casualty type||Average value of prevention|
Department for Transport, Transport Analysis Guidance (TAG)
Accident data is publicly available at www.crashmap.co.uk.