Project: Traffic & Accident Database

Reference: R128

Last update: 20/03/2006 10:25:16


The aim of the work is to ensure that road safety consequences are accurately taken into account in the appraisal of highway infrastructure improvements and other policies which are aimed primarily at relief of congestion.

The particular evidence which this project seeks is an understanding of how accident rates vary with levels of congestion on different types of road.

This contract will deliver
A GIS database representing the GB road network, at a range of levels of detail suitable for different types of analysis
Traffic flow data, accident data and available data on network detail (such as carriageway standard & speed limit) that is linked to this road network
A process for implementing regular annual updates in this dataset
such that the quality of the dataset produced is fit for the purpose of deriving accident rates which vary with traffic flow or congestion


This contract will pick up previous work in the field and assess the quality of the data. The contractor will agree with the Department & then implement a number of improvements to methodology, and deliver a database that is fit for purpose.

This contract will be undertaken in collaboration with TSR division, and draw on a wider network of DfT contacts with interests in digital road networks.

A subsequent contract will analyse the relationships between road capacity, traffic flow and numbers of accidents of different types, and produce accident models for use in project and policy appraisal. Road Safety colleagues will be invited to participate in this work.


Infotech Enterprises Europe Limited
Holborn Hall, 100 Grays Inn Road, London, WC1X 8AL
020 7343 1491

Contract details

Cost to the Department: £99,900.00

Expected start date: 28 May 2005

Expected completion date: 31 December 2007