A Missouri Department of Transportation (MoDOT) project closed the I-55 southbound ramp to southbound Hwy. 67 in Festus on Monday (Oct. 26).
Work on the project is estimated to be finished by Nov. 11, when the ramp can reopen.
MoDOT closed the ramp to construct pavement for a new auxiliary lane on I-55 between Hwy. A and Hwy. 67.
In July, the department closed the ramp for most of a day to improve safety conditions on the ramp, MoDOT announced.
Spokeswoman Rachel Sudduth said concrete was being added to expand the ramp area linking the highways because of recent accidents in which tractor-trailers had turned over on their sides while the drivers attempted to negotiate the ramp.
The department advises that traffic may detour around the closure by exiting at Hwy. A and taking Hwy. A east to Hwy. 67 south.