trrl is studying the use which is made of special facilities for cyclists and the effects of such provision on the behaviour and attitudes of residents, cyclists, motorists and other groups of people affected. this report deals with work carried out up to the opening of the experimental cycle routes in portsmouth on november 19th 1975. detailed descriptions are given of the road signs and carriageway markings used to define the routes and of special junction layouts. suggestions are made for methods of overcoming problems that appeared during the course of implementing the experimental routes. arrangements for the assessment of the experiment are outlined. results of the monitoring of the cycle routes and of attitude surveys of user and non-user groups will be given in a further trrl report which is in preparation.(a)

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