The $50.4 million project to revamp Route 1 near the University of Maryland began in May 2020.
The NWS has extended the flood watch until 8 p.m.
About 1 in 5 UMD students hold a commuter parking pass.
It closed part of College Heights Drive on Monday morning.
Pedestrians need protection.
Maryland must support vulnerable communities during highway expansion.
The 1.4-mile stretch between College Avenue and Route 193 will be widened.