To ask the Secretary of State for Transport, pursuant to the Answer of 17 January 2018 to Question 122085 on Crossrail, what criteria his Department uses to assess whether such proposals are good value for money.
The Department for Transport undertakes Cost-Benefit Analysis, using the guidance set out in WebTAG (available at https://www.gov.uk/guidance/transport-analysis-guidance-webtag), to inform enhancement decisions.
This analysis considers the impacts of alternative options to deliver a stated objective, and attempts to quantify them where possible. These impacts include the infrastructure costs of the scheme and the ongoing financial impacts for railway services, as well as the social impacts of the scheme for train users and other affected parties (such as road users and local residents). Wider economic impacts (such as making it easier for people to access more productive jobs) are also considered.