Traffic calming is a cost-effective method of:
- reducing accidents
- discouraging unnecessary through traffic
- reducing vehicle speeds.
Types of traffic calming
Traffic calming measures include:
- the installation of road humps and cushions
- road narrowing
- changes to road markings and signs
- changing existing speed limits.
The type of traffic calming installed on a road depends on the type of road and traffic flow:
- speed cushions are generally used on main bus routes and emergency routes
- full width humps (sometimes known as 'sleeping policemen') are used on other roads.
Interactive signs which show a vehicles speed as motorists approach will normally only be installed as a response to excessive speed. Certain criteria must be met.
Getting traffic calming installed
We will only consider installing traffic calming in circumstances where a problem exists on roads resulting in community concern, such as:
- inappropriate speed
- excessive volume of through traffic
- a measure to assist in accident reduction.
The decision on whether to install traffic calming on a particular road is based on various factors including:
- the existing accident record
- the category of road (traffic calming will not be installed on major roads unless in response to accidents)
- more than 250 vehicles travel through the site during a typical peak hour and the majority of these vehicles exceed the stated speed limit by 20 percent or more (eg faster than 36mph in a 30mph zone)
- houses front more than half of the affected road
- substantial public support is received for the introduction of traffic calming measures.