We are currently revising and updating our detailed views on all aspects of cycling infrastructure and these will be published in due course. For general principles, please have a look at our 'overview' briefing on cycle-friendly design and planning.
The following is an extract from our Policy Handbook (March 2004):
- Traffic calming can benefit cyclists by reducing the speed of traffic, provided it is of a cycle-friendly design. Vertical deflection can be very effective at slowing traffic but the ramps must have long, smooth profiles, approximating to a sinusoidal shape.
- Wherever possible the introduction of pinch points that squeeze cyclists, e.g.: by providing central refuges, should be avoided. At 30 mph the minimum width beside a refuge that allows safe overtaking without intimidation is 4.5m. Only below 20 mph should narrower widths be considered.
- Pinch points should not be introduced without consultation with local cyclists. Where such a measure is unavoidable, the Transport Research Laboratory has identified optimum widths for pinch points.
- A very effective way to calm traffic in a benign manner is to have reduced priority at all junctions, such as the use of all-way give-ways in other countries.
- There is a range of subtle but effective 'natural' or 'traditional' methods of traffic calming which can also be employed, such as are implemented in Home Zone schemes.