We are currently revising and updating our views on traffic calming and these will be published in due course. In the meantime, these are extracts from CTC's current 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.