Smart motorways systems dubbed ‘Die Now’ crashed three times in just four days

The computer systems controlling signs on smart motorways have been nicknamed “Die Now” by staff after they became “unusable” three times in just four days, the Sunday Telegraph can reveal.

Signals across hundreds of miles of the M1, M4, M5 and M62 could not be changed prompting a “horrified” whistleblower at National Highways, the rebranded Highways England, to warn “someone is going to get killed”.

The insider told how the roads equivalent of air traffic control had repeatedly “gone down” last April, just as Grant Shapps, the Transport Secretary, announced the continued roll-out of smart motorways.

A Freedom of Information request to National Highways, the Government-owned company, shows two control centres covering Yorkshire, the North East and South West of England were hit by a computer “bug” and server problem disabling digital control of signs for a total of eight hours.

Dynac, the software used to set signs and signals, including the red X on overhead gantries which closes lanes in which motorists have broken down, was rendered “unusable”, according to documents.