Timing and design reduce delay and conflicts.
Intersections can be unsignalised (priority, roundabout) or signalised. Signal timing uses cycle length (Webster C=(1.5L+5)/(1-Y)), phases, green splits and offsets for coordination. Roundabouts reduce conflict points and severity. Pedestrian and cycle needs matter.
A coordinated corridor gives a 'green wave' for platoons.
Intersections are where most conflicts and delays occur on roads, so their design and signal timing have a large effect on safety and capacity.
Timing and design reduce delay and conflicts.
Intersections are where most conflicts and delays occur on roads, so their design and signal timing have a large effect on safety and capacity.
They reduce the number of conflict points and lower speeds, which usually reduces the severity of collisions.
The total time for all signal phases to run once, and cycle length affects both delay and capacity.
Typical applications include timing a traffic signal to reduce delay at a busy junction, designing a roundabout to replace a crossroads with a poor accident record and adding a right-turn lane to improve capacity at a T junction.
Study "Traffic flow theory" first (topic 95 of 112 in Civil & Structural). It covers the groundwork this topic builds on.
Saturation flow. Delay and level of service. Adaptive control.
A coordinated corridor gives a 'green wave' for platoons.
The next topic is "Railway engineering", which builds directly on this one.
It is classed as Advanced in Civil & Structural (topic 96 of 112). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Civil & Structural.
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