Research and analysis

Factors impacting road traffic growth

Evidence assessment review of peer-reviewed papers and reports to gain a better understanding of traffic growth trends.


Latest evidence on factors impacting road traffic growth: an evidence review

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


Rapid evidence assessment review updating evidence on:

  • traffic growth trends
  • the factors driving traffic growth trends

The review presents findings on how car usage and ownership are affected by:

  • technological changes
  • social attitudes
  • economic situations
  • demographics
  • political approaches
  • geographical locations
  • environmental changes

The findings from this research informed the development of the Draft ‘Road Investment Strategy 2’.

Published 29 October 2018