Cut-and-cover subway

The A630 dual carriageway connects Sheffield with the M1. Carrying 50,000 vehicles a day between the city and the motorway, it is inevitably a traffic hotspot. Burrowed beneath the A630 was a vehicle underpass that fed local traffic. Osborne was asked to construct a new subway designed specifically for non-motorised traffic to run parallel to the existing bypass which would allow pedestrians, cyclists and equestrian riders to travel more safely, and would also allow the widening of the existing bypass from two lanes to three. The challenge was to carry out the required works while maintaining traffic flows and minimising disruption to road users. The subway was built in situ by programming three meticulously planned sections, with bridge specialists ABM employing the Matière Opti-Cadre box bridge system. Consisting of precast units this system reduces construction time and offers cost and safety advantages. The author describes in detail how the superstructure was constructed followed by information on phasing the flow into three phases involving reducing eastbound traffic and westbound traffic to minimum lane widths in separate phases, then running the traffic over the new sections at the end of each phase, allowing the third phase to be completed. The whole project permitted traffic flows and was completed in was completed in 12 months.


  • English

Media Info

  • Pagination: 18-19
  • Serial:
    • Volume: 43
    • Issue Number: 3
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 01146974
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 24 2009 8:33AM