Project: Safe Town Initiative: Environmental Effects

Reference: UG106

Last update: 20/01/2010 15:03:41


The objective of this project is to monitor and report on the environmental effects of the Gloucester Safe Town project over a five-year period.


Road Safety Division's Safe Town project, S2041, is examining the road safety effects of area-wide engineering measures in Gloucester over a five year period. The purpose of UG106 is to monitor the effects on the environment of the engineering measures, with particular reference to air quality, noise, traffic induced ground vibrations, and the public's perception of changes in these. The project is also examining the benefits and disbenefits of measures in environmental terms, and how these results might be interpreted for similar measures in other towns. A final report will be published of the results of the investigations. Guidance will be produced, taking into account the findings of UG93, on good practice for minimising any adverse effects of traffic management on the environment.


TRL Limited
Crowthorne House, Nine Mile Ride, Wokingham, Berkshire, RG40 3GA
+44 (0)1344 773131

Contract details

Cost to the Department: £832,881.71

Actual start date: 25 June 1996

Actual completion date: 21 November 2003


TRL Report 423 Remote Sensing of Vehicle Emissions Near Two Traffic Calming Measures in Gloucester
Author: PG Boulter
Source: TRL

Remote sending of vehicle emissions as a tool for assessing traffic management policies
Author: PG Boulter
Source: TRL Annual Research Review

Remote sensing of vehicle emissions near traffic calming measures
Author: PG Boulter
ISBN: 2-85782-533-1
Source: Proceedings of 9th international symposium on Transport and Air Pollution, Avignon, France. 5-8 June, pp529-534.

 TRL Report 444 – ‘The impacts of the Gloucester Safer City Project on road traffic emissions in Gloucester 1996-1998
Author: PG Boulter
Source: TRL

 TRL Report 488 - The impacts of the Gloucester Safer City Project on Air quality, 1997-1998
Author: J Cloke and G J Davies
Source: TRL

Trends in speed, emissions and air quality during the Gloucester Safer City Project
Author: PG Boulter, J Green and RE Layfield
April 03
Source: TRL

Safer City - the Case of Gloucester
Author: A Mackie and R Layfield
May 1998
Source:  Helsinki Transport Environment and Safety Week, Conference on ‘Integrated Strategies for Safety and Environment'

The impacts of the Safer City Project on road traffic emissions in Gloucester
Author: P G Boulter
To be published
Source: TRL

Summary of results

  1. Given the overriding effects of the changes in vehicle technology and fuel in recent years , the introduction of safety/traffic management measures in Gloucester has not led to significant changes in local air pollution levels. As the effects of catalyst technology and fuel changes stabilise over time, the effects of traffic speed control measures could begin to have an effect on roadside air quality. That said, this study has shown that these effects are likely to be small and localised to the immediate vicinity of the scheme.

Departmental Assessment Status: n/a