Highway Traffic Analysis and Design

Part 1 Traffic analysis and prediction: introduction to the transportation planning process; the transportation study area; the collection of existing travel data; the external cordon and screenline surveys; trip generation and distribution; modal split; traffic assignment; the evaluation of transportation proposals. Part 2 Analysis and design for highway traffic: the capacity of highways between intersections; headway distributions in highway traffic flow; the relationship between speed, flow and density of a highway traffic stream; the distribution of vehicular speeds in a highway traffic stream; the macroscopic determination of speed and flow of a highway traffic stream; intersections with priority control; driver reactions at priority intersections; delays at priority intersections; a simulation approach to delay at priority intersections; roundabout intersections; merging, diverging and weaving at grade separated junctions and interchanges; queueing processes in traffic flow; geometric delay at non-signalized intersections; grade-separated junctions; the environmental effects of highway traffic noise and pollution; traffic congestion and restraint. Part 3 Traffic signal control: introduction to traffic signals; warrants for the use of traffic signals; phasing; signal aspects and the intergreen period; signal control strategies; geometric factors affecting the capacity of a traffic signal approach; the effect of traffic factors on the capacity of a traffic signal approach; determination of the effective green time; optimum cycle times for an intersection; the timing diagram; early cut-off and late-start facilities; opposed right turning vehicles and gap acceptance; the ultimate capacity of the whole intersection; the optimization of signal-approach dimensions; optimum signal settings when saturation flow falls during the green period; delay at signal-controlled intersections; determination of the optimum cycle from a consideration of delays on the approach; average queue lengths at the commencement of the green period; the co-ordination of traffic signals; time and distance diagrams for linked traffic signals; platoon dispersion and the linking of traffic signals; the prediction of the dispersion of traffic platoons downstream of signals; the delay offset relationship and the linking of signals; some area traffic control systems.