Sat-nav revolution: new digital map will stop lorries getting stuck under bridges and on narrow lanes

Ordnance Survey, Britain’s mapping agency, has produced a digital map that charts about 200,000 miles of roads and will be introduced next month.

It includes information on bridge heights, weight restrictions, road widths and bans on left or right turns at junctions, and will also be able to warn drivers about speed restrictions, roadworks and cycle lanes.

The £3 million project, which has been in development for two and a half years, comes after figures published by the Department for Transport last year showed that the majority of drivers use sat-navs instead of paper maps.

There are also plans to introduce sat-navs as part of the driving test, with a revised practical test trialled in the UK last year.

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