The Virginia Department of Transportation began warning contractors Friday that they may have to halt work next month because of the General Assembly’s failure to pass a state budget.

A suspension could impact 473 construction and maintenance projects valued at $2.7 billion, including interstate, primary, urban and secondary road and bridge improvement projects.

VDOT officials say they are providing contractors with a two-month notice to wind down operations starting May 1 so they will have time to stop work and get paid. It takes weeks to shut down construction projects because of coordination between VDOT and contractors over materials, heavy equipment, crews and work zones.

The suspension would be lifted once a state budget is in place for the next fiscal year beginning July 1.

Most House and Senate budget negotiators have agreed to the two-year, $85 billion spending plan, paving the way for a Tuesday vote by all 140 members of the General Assembly. But it’s unclear if it will pass.