an experimental dial-a-bus service has been running in harlow since august 1974. it connects the residential neighbourhood of old harlow to a number of destinations in harlow new town between the hours of 07.00 and 23.30. after six months the service was carrying over 4000 passengers per week at an average load factor of 50 per cent. lack of a telephone had not proved a significant deterrent to using the service. about 75 per cent of passengers were booking journeys and/or receiving doorstep service. survey results are given that indicate the purposes for which journeys were made and the mode that would have been used if dial-a-bus were not available. the experimental results are found to compare well with predictions made using a conventional modal choice model. the cost of the experimental service is 4.86 per bus hour and the gross revenue covers about 30 per cent of this cost. it is estimated that a non-experimental service could cost 3.09 per bus hour and achieve revenue to cover 60-70 per cent of its cost.(a)

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