Part of the M1 has been closed after a silver BMW convertible car overturned trapping the driver inside.
Emergency crews, including the Herts Air Ambulance, were called to the scene on the northbound carriageway between Hemel Hempstead and Redbourn at 8.47am today.
A man, believed to be aged in his 20s, has been taken to Luton and Dunstable Hospital.
Both sides of the motorway were closed between J8 and J9. The southbound carriageway was re-opened just after 9.30am and the northbound carriageway was due to open at 10.30am.