Further one year trials of speed control humps have been made on four different urban roads to assess their effects in specific circumstances. The sites were all 30 mile/h restricted and comprised a scheduled bus route through a residential estate, a non-residential road in a conservation area, a seaside esplanande, and an urban road containing a small shopping parade where the traffic included many heavy goods vehicles. Details of the effects of humps on traffic flow and speed, pedestrians, residents' opinions, and road accidents are described. The speed of both cars and lorries was reduced at two of the sites carrying through-traffic. Crossing the road by pedestrians was shown to have been made slightly easier at the esplananade site and, compounding data from all sites, accident casualties were reduced. The majority of residents and drivers were in favour of the humps but rather more discontent was expressed by residents along the bus route. (A)

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