Traffic Engineering

Examples 1-33: measurement of highway traffic stream speed, time and space mean speeds; distribution of highway traffic speeds, fitting to a normal distribution; highway journey speeds, moving car observer method; theoretical basis of the moving car observer method; car following theory illustrated by an example; the negative exponential distribution applied to headways on highways; the double exponential distribution applied to headways on congested highways; flow, speed and density relationships for highway flow; flow, speed and density relationships applied to a highway bottleneck; queueing theory applied to highways; priority intersections, gap and lag acceptance; delays at priority intersections illustrated by example; the capacity of oversaturated priority intersections; geometric delay at an at-grade roundabout; relationships between entry and circulating flow at roundabouts; determination of roundabout entry width; design of weaving sections; merging on to high speed roads; design of merging and diverging lanes at grade separated junctions; introduction to signal control; traffic signal cycle times; right turning flows at traffic signals illustrated by an example; variation of delay with cycle time at traffic signals illustrated by an example; delay at traffic signals illustrated by an example; design of a traffic signal controlled intersection; design of a three phase traffic signal controlled intersection; platoon dispersion between signal controlled intersections; combination method of minimizing delays in traffic signal controlled networks; costs and benefits of highway traffic flow; economic assessment of highway improvements; calculation of highway operational costs; simulation of highway headway distributions; simulation of delay at highway priority intersections.