A multi-billion-pound rail upgrade programme started on Tuesday, with passengers being promised more reliable services.
Network Rail’s £2.2bn investment over the next five years will see the rebuilding of Ely north junction which will relieve congestion between Norwich and Cambridge.
Other improvements on the Norwich-to-London Great Eastern Mainline include upgrading overhead cables near the capital, replacing tracks and renewing points around Colchester, and rebuilding Bow Junction to create more capacity at London Liverpool Street.
A new rail operating centre controlling the railway in East Anglia will open in Romford and level crossing safety will be improved.
The completion of the Crossrail station at London Liverpool Street could also reduce congestion on mainline services, as will work to the cross-country route for freight from Felixstowe.
The upgrades are necessary to achieve the journey time reductions sought by the task group set up by Chancellor George Osborne last year, which targets Norwich to London in 90 minutes.
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