A £5.3 million pound car share lane stretching between Bradford and Leeds is the first car share lane to open in the UK.
It's unveiled today by Transport Secretary Ruth Kelly, who says this example could be copied on 500 miles more of the UK's motorways.
Multi-occupancy cars can now use the lane heading southbound on the M606 where it meets the M62.
The lane allows cars with more than one occupant to use it and Miss Kelly says it should save commuters up to 40 minutes on their journey.
Motorcycles will also be allowed to use the 1.7-mile section of motorway, even if they are riding solo, but lorries are banned.
Ms Kelly said: 'Currently, four out of five vehicles using this busy junction have only one occupant.
'I hope this new lane will encourage people to share their journeys to ease congestion, cut journey times and improve air quality.'