A Mt. Vernon woman was injured in a single-vehicle crash that occurred at 4:40 p.m. on Monday on Route T, about a mile and a half south of Highway 174.
The crash occurred when the driver of a 2009 Toyota Prius, Susan D. Hewitt, 63, of Mt. Vernon, fell asleep, ran off the roadway, into a ditch and struck several large rocks.
Hewitt was taken to Mercy Hospital in Springfield with minor injuries. She was wearing a seat belt.