Traffic Surveys

MQT on 2007-01-30
Session date: 
January 30, 2007
Question By: 
Angie Bray
GLA Conservatives
Asked Of: 
The Mayor


Why did traffic surveys being conducted by the traffic consultant company, Buchanans, have to stop vehicles in Westminster between 17th October and 30th November 2006, thereby having to use MPS officers to assist in data gathering? What was the survey for?


Answer for Traffic Surveys

Answer for Traffic Surveys

Answered By: 
The Mayor

The surveys concerned were Roadside Interview Surveys (RSI's), a commonly used technique in traffic studies. The method is described, for example, in guidance from the Department for Transport (DfT). This type of survey is the most appropriate means of understanding the detailed nature of traffic using a particular road. Questions usually include the origin, destination and purpose of the journey. The law requires the presence of a police officer to stop moving vehicles so that surveyors can select vehicles for interview. While people are legally obliged to stop, participation in such surveys is voluntary.The particular surveys in question were undertaken to support the monitoring of congestion charging. They are intended to help understand the nature of travel in the area between the existing central London congestion charging zone and the western extension.