Motorists who normally use Interstate 70 in Frederick will need to make some adjustments to their driving. The Maryland State Highway Administration is temporarily closing the ramps to and from eastbound I-70 to South Street. But it's reopening the ramp from westbound I-70 to South Street and Monocacy Boulevard. Both will occur on Thursday night.

Spokeswoman Heather Keels says the two ramps will be closed until sometime in the fall.

In addition to that, SHA says the ramp onto to westbound I-70 to South Street and Monocacy Boulevard, which has been closed since June, will remain closed.

It's all part of the massive project to widen I-70, which includes the replacement of the bridges over South Street. "We really appreciate everyone's patience as we get through this part of the project as quickly as possible," Keels says. "You'll see the detour signs set up that will direct you how to get on and get off of '70 there."

But Keels acknowledges that these road closures could affect motorists coming to the Great Frederick Fair from September 14th through the 22nd. "But we are working with the Fair to make sure that all the signage to point people to the Fair will take that into consideration," she says.

SHA suggests drivers heading to the Fairgrounds from I-70 use Exit 56, which takes them to East Patrick Street.

But Keels says there is some good news. The I-70 widening project is expected to be finished by the summer of 2013.