What national guidelines exist on the installation of traffic lights in towns and, in particular, on the maximum number of sets of traffic …

General advice on traffic signalled junctions is contained in the Design Manual for Roads and Bridges, in Local Transport Notes and in Traffic Advisory Leaflets. For pedestrian crossings guidance suggests a minimum spacing of 100 metres to adjacent signals, depending on local circumstances.There is no specific guidance on the maximum number of sets of traffic signals in a defined area. This would be determined by the density and other characteristics of the road network being managed.Responsibility for traffic management on local roads is a matter for determination by the individual traffic authorities.