https://www.theregister.co.uk/2018/07/16/researchers_hack_gps/

Researchers have developed kit that masquerades as GPS satellites to deceive nearby GPS receivers and thus potentially trick drivers into heading off in the wrong direction.

The team – a trio of groups at Microsoft, Virginia Tech in the US, and the University of Electronic Science and Technology of China – detailed in a paper out this month that, by spoofing the packets of data sent to smartphones and cars' built-in navigation systems from orbiting positioning satellites, they can remotely change the routes with up to 95 per cent accuracy.