Abstract
Rumble devices can now be installed under the Traffic Calming Regulations, within certain permitted design dimensions. Outside these dimensions special authorisation can be sought, (see Traffic Advisory Leaflet ; 3/93, see ST 991833 fo), thought justification will be required as to why the features could not conform. This leaflet is intended to provide further explanation of the dimensions given in the regulations, and other advice on appropriate uses for these features. (A)