Despite privatisation being on the agenda, in Yorkshire the Wharfedale line was electrified starting in 1994 by British Rail. A follow on from the Chiltern Main Line upgrade was to be the nationwide roll-out of the Automatic Train Protection system, which helped prevent accidents caused by Signals Passed at Danger (SPADs). However, privatisation intervened and this plan was abandoned. A lack of resources also led to the cancellation during the planning stage of other major infrastructure refurbishment projects, including Crossrail, an east-west line through London which is now being constructed. Originally due for completion in 2018, the opening date has since been pushed back to March 2021. The InterCity 250 upgrade to the West Coast Main Line was also cancelled, this instead ran as the West Coast Main Line upgrade which allowed tilting Pendolinos to run at 125 mph.