Coming up with a solution to keep the unelectrified East Suffolk Line running after the Band III Private Mobile Radio frequency used to control trains via an Radio Electronic Token Block (RETB) system was allocated to the MOD. It was not possible to allocate new frequencies without undertaking a new safety case and obtaining new Network Rail product approval. The RETB system had to be replaced.
The East Suffolk Line runs between Ipswich and Lowestoft for passenger services operated by Greater Anglia and nuclear flask trains for the Sizewell nuclear power stations operated by Direct Rail Services. Train control on the line between Westerfield Junction and Oulton Broad North, was achieved via the (RETB) system, which was installed in the 1980s as a cost effective way of controlling trains with minimal lineside infrastructure.
A cost/benefit exercise carried out with Network Rail concluded that the best option was to replace the RETB system with a signalling solution designed around the principles of Track Circuit Block, which replicated the existing functionality required to run a train service.
Kier, as principal contractor, was responsible for the design, installation and commissioning including permanent way, civil, electrical, telecoms, signalling and systems. A conventional SSI (Solid State Interlocking) solution was used, which required a new signaller’s control system and Mk III SSI interlockings at Saxmundham Signal Box. Axle counters, which detect the passing of a train between two points on a track, were used in the 'long section' areas and track circuits within the station limits. A new passing loop, where trains can pass each other at a station, was also installed at Beccles Station to allow an hourly train service.
The new system signal system has enabled the line to remain open serving the local communities.
The new passing loop at Beccles Station has increased the capacity of the line.
Delivering a 100% BIM3 compliant utilities design at one of London’s busiest interchanges, Bank Station. Serving 73 million passengers annually, situated between London Bridge and the Bank of England.
Constructing two railway tunnels that run for 6.4km between the Royal Oak portal and the new Farringdon Crossrail station in Central London. Huge scale building of station tunnel caverns at Bond Street, Tottenham Court Road and Farringdon for the new Elizabeth line.
Working with Network Rail to keep the line between Ipswich and Lowestoft up and running. Replacing the line's Radio Electronic Token Block (RETB) system after the frequencies were allocated to the MOD, coming up with a workable solution with the client and ensuring this vital rural connection remained in service.
A high profile 3km route clearance of 1500 utility conflicts through Edinburgh city centre, delivered within budget and achieving all programme milestones, whilst minimising disruption to local businesses and residents.