Drivers can be hit with a £100 fine and three points if they ignore this new smart motorway law.
From next month, motorists who drive in closed lanes on smart motorways can automatically be handed a £100 fine and three penalty points.
Police will be given the power to punish drivers caught on traffic cameras ignoring red X signs, under new Home Office legislation which comes into force on June 10.
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Currently motorists who drive in closed lanes are only fined if they are caught by an officer at the time of the offence.
Hundreds of miles of motorways across England have been converted into smart motorways.
This means the hard shoulder is used as either a permanent or part-time running lane.
Smart motorways are stretches of motorway that monitor and manage the flow of traffic.
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There are several ways they operate - including hard shoulder running, controlled motorway (using variable speed limits) or a red ‘X’ on the overhead gantry.
Red Xs are used to indicate when a lane is closed, such as when a vehicle has broken down away from emergency laybys.
Highways England, which operates England's motorways and major A-roads, has issued more than 180,000 warning letters to drivers who have ignored red X signs since the beginning of 2017.
AA president Edmund King said the use of cameras to catch offenders is a "welcome measure to improve safety".
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He went on: "Our research shows that one in 20 drivers continue to drive in red X lanes even when they've seen it, and so far Highways England have written warning letters to over 180,000 drivers about their actions.
"Red Xs are put up to warn of an obstruction, so drivers must get out of the lane when they see them.
"We have had several incidents recently where AA members' cars have been hit in a live lane on smart motorways."