Four compulsory purchase orders are needed for the scheme
People campaigning against a £57m transport plan for Bath will hold a public meeting on Wednesday to discuss a legal challenge.
Protesters have filed a judicial review because they are unhappy about planning permission being given to the scheme.
The scheme includes building a park and ride site on Bathampton Meadows to the east of the city.
Bath and North East Somerset Council has said the scheme is needed to combat congestion in the city.
In December Transport Secretary Lord Adonis called a public inquiry into the transport package for Bath.
The inquiry, to be convened in the next five-and-a-half months, will examine four compulsory purchase orders needed for the scheme to go ahead.
The meeting will take place at Batheaston Methodist Church from 1930 GMT.