Two groups are calling for “greater public oversight and accountability” on a planned deal to hand the Dulles Toll Road and the Dulles Metrorail project over to the Metropolitan Washington Airports Authority.

The heads of the D.C.-based Coalition for Smarter Growth and the Virginia chapter of the Sierra Club both say they want to see public hearings held on the pending transition. Under the proposal, the Commonwealth of Virginia would cede to MWAA operations of the toll road — and eventually the $4 billion rail extension the tolls would help pay for. Both groups are also urging officials to put the Metrorail project out for competitive bidding.