The M4 is poised to have alternative energy refuelling points fitted along its route.
The scheme, which will run from London to Wales and will be extended to the Midlands, is aimed at making hydrogen and electric-powered vehicles a viable alternative to petrol-driven machines.
The plan is set to be announced later today, along with the announcement of the creation of Low Carbon Economic Areas (LCEA) in the UK, where the government will invest money in areas to promote greener transport.
In a separate initiative, business secretary Lord Mandelson has announced a £19 million LCEA package in the Midlands, which he says will help secure 10,000 jobs.
A £19 million funding package for developing low-carbon vehicles will help to secure 10,000 jobs in the Midlands car industry, said Lord Mandelson.
"I want to see the Midlands help the UK to lead the global automotive industry in the transition from conventional to low-carbon vehicle technologies," he said.