A406

A406

Photo credit: Philip Lane


Project: A406 North Circular Road
Client: Department of Transport

Improvement of 4km of major urban ring road to grade separated dual carriageway standards, involving two multi span flyovers and an underpass. In excess of 100 structures, including 310m dual 2-lane tunnel to carry trunk road beneath two highway junctions and rail embankment, 835m dual 2 lane steel/concrete composite viaduct to carry trunk road over major junction, a railway and new highway, 670m dual lane steel/concrete composite viaduct to carry traffic over new roundabout and three water courses. Production of feasibility studies for various options for improvements, traffic modelling and forecasting. Assessment of scheme economics and environmental effects. Liaising with all interested parties. Preparation for public exhibitions and inquiry. Detailed design and preparation of tender documents and construction supervision. Project value £120m.