Fairfax County leaders hope a newly discovered, $1 billion cache of state transportation funds will jump-start a number of local road and rail improvement projects.

The Fairfax Board of Supervisors plans to ask the state of Virginia for roughly $340 million to pay for transportation projects the county says are urgently needed, including Interstate 66 improvements, “Phase 2” of rail construction to Washington Dulles International Airport, and a number of neglected maintenance measures on local roadways.