Before and After Study of the A14 Trunk Road
EMMERSON P and PAULLEY N, Transport Research Laboratory, and KOVACEVIC V, Highways Agency, and SMITH R, Department of Transport, UK
This paper reports on a 'before-and-after' study conducted for the Department of Transport as part of a programme of work investigating the range and extent of responses to the provision of new infrastructure. These responses could include re-routing of t
This paper reports on a 'before-and-after' study conducted for the Department of Transport as part of a programme of work investigating the range and extent of responses to the provision of new infrastructure. These responses could include re-routing of trips, re-timing of trips, changes in mode, changes in trip distribution (origins or destinations) and changes in trip frequency (increases or decreases), including entirely new trips.
On the 15th July 1994 the final (western) section of the A1/M1 link (A14) was opened. This 22 mile (35 kilometre) section of the road, from Rothwell west of Kettering to the M1/M6 junction at Catthorpe on the M1, completed the link between East Anglia and the M1 (the eastern end of the road being then known as the A604). Thus there is now a high standard dual-carriageway route from the North-West and the West Midlands all the way to the East Coast Ports of Felixstowe and Ipswich (distances of 150 miles (240 kilometres) or more). The A14 is largely grade separated with infrequent junctions.
It was considered that the opening of such a significant new long-distance route would be certain to have a considerable effect on traffic flows over a wide area. It was felt that a study of the impacts of the scheme would be useful as it would extend the type of infrastructure improvements being investigated under the Department's overall programme on the responses to congestion.
This paper concentrates on the identification of the major changes that have occurred, and especially on the evidence for the relative effects of re-assignment and any possible trip inducement one year after opening. Some longer-term analysis could be undertaken over the next few years.
Association for European Transport