Q #377 - What's used to reduce traffic bunching on a motorway?
Congestion can be reduced by keeping traffic at a constant speed. At busy times, maximum speed limits are displayed on overhead gantries. These can be varied quickly, depending on the amount of traffic. By keeping to a constant speed on busy sections of motorway, overall journey times are normally improved.
| Variable speed limits | |
| Contraflow systems | |
| National speed limits | |
| Lane closures |
