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This research is part of an overall effort to develop cost effective techniques for direct access control that will optimize traffic operational efficiency and safety subject to providing sufficient and suitable access to commercial properties on arterial highways. The research involved (1) a preliminary evaluation to select feasible and cost- effective candidate techniques, and (2) the development of detailed experimental procedures for evaluating the effectiveness of these candidate techniques. The scope of research was limited to control of direct access to commercial properties on two-lane and multilane highways with unlimited access, where traffic volumes are high enough to produce a hazardous situation. The emphasis was on the control of direct access on existing urban and suburban routes under state highway department jurisdiction.
The document is intended to give highway agencies general guidelines toward a more comprehensive application of direct access controls to commercial properties on arterial highways. Volume I discusses the basic problem dimension, summarizes the evaluation of the 70 identified techniques, and gives a general decision framework for implementation of access controls. Volume II is a reference document containing detailed descriptions of the design, application, cost, operational effectiveness, and cost-effectiveness of each access control technique.
The document is intended to give highway agencies general guidelines toward a more comprehensive application of direct access controls to commercial properties on arterial highways. Volume I discusses the basic problem dimension, summarizes the evaluation of the 70 identified techniques, and gives a general decision framework for implementation of access controls. Volume II is a reference document containing detailed descriptions of the design, application, cost, operational effectiveness, and cost-effectiveness of each access control technique.
The full range medial and marginal control, in cases of both full and partial control of access was studied to enable the highway administrator to determine the appropriate degree of access control, and to provide him with the physical means of accomplishing such control. Access control is of principal importance in insuring that an arterial, once constructed and opened to traffic, will continue to have a high traffic movement capability in future years. The street and highway networks of local areas, urban regions, states, and the nation should adequately provide for the conflicting functions of land access and longer trips.