York Council is contacting key members of the city's business world in the hope that a groundswell of support will persuade Ministers not to slash finance for the multi-million pound initiative.
Under the proposals, the existing but over-subscribed Askham Bar park and ride site would be replaced with a larger facility, and two new park and ride locations would be created on the A59 near Poppleton and on Wigginton Road at Clifton Moor.
New bus priority measures would also be put in place and a major upgrade carried out on
the A59/A1237 roundabout on the city's congested outer ring road.
It is thought the support of key stakeholders from the business and environment sectors will play a key role in discussions with the Government.
The council says the scheme will help stimulate the economy, boost tourism and provide a sustainable transport alternative.