What’s used to reduce traffic bunching on a motorway?

Explanation: 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.

Category: Motorway rules

References: The Official DVSA Guide to Driving: Section 18, Highway Code: Rule 261