The cost of building Crossrail 2 will increase by £1.8bn each year the project is delayed, according to its managing director Michele Dix.
Speaking at New Civil Engineer’s Transport Conference, Dix said the cost to build the line is now £31bn, but for every year it was delayed that figure would increase by nearly £2bn.
“The impact of delaying the scheme and moving the construction back is around £2bn per year,” she said. “It’s a big figure, so we’d like a decision soon.”
The business case for the line was submitted to the government by Transport for London (TfL) in March but a decision has been delayed because of the recent election.
Since then, business leaders and political figures have been pushing for the project to get the go-ahead, saying it would help alleviate further overcrowding on the commuter lines into and out of central London as well as the Underground. Without it, they said stations including Waterloo, Clapham Junction and Euston will ”simply buckle” through overcrowding.
Only last week, the National infrastructure Commission (NIC) waded into the debate demanding “urgent progress” on making a decision.
A Hybrid Bill for the part overground, part underground, line was due to go to Parliament in 2019. This now looks likely to be pushed back to 2020 with the aim of getting Royal Assent in the early 2020s.
The planned route for the line is from Shepperton, Chessington South and Epsom in the south to Broxbourne and New Southgate in the north. The section through central London from Wimbledon to Tottenham Hale is to be tunnelled.