Will a traffic signal reduce crashes at an intersection?

The Manual on Uniform Traffic Control Devices suggests that signals should not be installed under the premise of reducing collisions, unless five or more right-angle type occur per year.  Studies indicate that an increase in total collisions should be expected at intersections having fewer than five right angle collisions per year prior to signalization.
The purpose of signals is to improve overall traffic flow.  Signals can be helpful in reducing right-angle collisions under certain circumstances, but almost always result in an increase in other types of collisions such as rear-end and left turn collisions.  As well, signals can also give pedestrians a false sense of security. 

Learn more by visiting Traffic Signals and Management.

Show All Answers

1. How are speed limits determined?
2. How can I make comments regarding Springfield traffic?
3. When should a traffic signal be installed?
4. What is traffic engineering?
5. Will a lower speed help reduce speeding?
6. Will a traffic signal reduce crashes at an intersection?
7. Does the City install "Children At Play" signs to slow traffic ?
8. Will more stop signs slow traffic on a street?