A TRIAL car-sharing lane could be introduced on the M62 in an attempt to fast-track commuters into Leeds.
Transport Secretary Alistair Darling has announced the plans for a busy stretch of the motorway between junction 25 at Brighouse and junction 27 at Leeds.
It is among four congestion hotspots being investigated for an experimental scheme.
The new lanes would operate only during morning rush-hour.
They will be reserved for so-called high occupancy vehicles - carrying two or more people.
Drivers travelling alone who encroach on the lanes will face fines of up to £100. The lanes could be created by using the hard-shoulder or by widening the road.
The plan sparked immediate environmental concerns over the possibility of a new lane being built on the M62.
Mr Darling said he would consider the options before announcing which motorway would be chosen for the trial.
The other motorways being looked at for car pooling are the M61 north-west of Manchester, M3 into London and the M1 from Milton Keynes to St Albans.
Clr Ann Denham, Kirklees Council Cabinet member for environment and highways, said of the M62 plan: "This is an extremely busy stretch and it is easy to see why it is being looked at.
"Car sharing could be a way of cutting congestion, but there is a huge issue about how it might be implemented on the M62.
"There will be many environmental concerns if road widening is to be proposed and there will have to be full consultation about it."