The Maryland State Highway Administration plans to put a new traffic pattern into effect on Interstate 270 in Frederick by the middle of the week.
Late Wednesday night, construction crews will begin sending southbound drivers on I-270 onto a new bridge above Md. Route 85.
The ramp from southbound I-270 onto northbound Route 85, Buckeystown Pike, will reopen ahead of schedule, the Highway Administration said.
"They made great strides," said highway administration spokesman Charlie Gischlar, adding that work to match the ramp pavement elevations with the new travel lanes was completed faster than expected.
The new traffic pattern will mark the next phase in a replacement of the overpasses that carry the interstate highway above the state highway below. The pair of old bridges will be replaced with a single span that will have improved acceleration and deceleration room.
Several crashes have occurred in the work zone in recent months, including a pileup on Sunday that sent several people to the hospital.