Motorway road works: effects on traffic operations

  • Published: University of Salford, 2002
  • Authors: Yousif, Dr. S
  • Date Added: 04 Feb 2013
  • Last Update: 04 Feb 2013
  • Format: pdf


To explore parameters relating to safety and capacity at actual roadwork sites.


Data collection was at sites on the M6 and the M61 via roadside camcorders; data was extracted and flow and speed data based on five minute intervals.

Key Fndings:

During free flow conditions there was poor compliance with the posted mandatory 50mph limit. This trend was consistent across both open lanes and for the duration of the studied period.


Flow, speed, compliance


The period of study was short (~ half a day) and results are reliant on robust data extraction techniques. Nevertheless, the study indicates that, in the absence of enforcement on this particular scheme, speed compliance levels are very poor.