The scheme was a design build project with Jons Civil Engineering which comprised the retrofitting of 1 No. ADS/VMS Portal, 5 No. Group 2 Portals, 1 No. Group 3 Portal, 7 No. Group 4 Cantilevers and 1 No. Group 5 Cantilevers to the M1 and M11 Motorways. The works were carried out in live traffic situations (70,000 AADT), sometimes at night time so that traffic management was a vital consideration.
OCSC took the scheme from preliminary design through to detailed design, construction monitoring and site supervision. OCSC’s structural engineering was vital in reducing the overall weight of steel and reinforcement in the final design.