Work is scheduled to begin Monday on two Interstate 35 bridges in the Norman area that are part of an effort to accommodate increased traffic.
A new interchange will be built, and new ramps will be installed at Main Street in Norman. The $35 million project is expected to be completed in less than two years, according to the state Transportation Department.
The Main Street bridge over I-35 will be replaced with what state transportation officials call a single point urban interchange, which includes longer on- and off-ramps at I-35 and a wider Main Street bridge.
The interchange is built around three-way traffic signals above I-35, which are designed to improve traffic flow for drivers getting on, off and through Main Street.
The project also will widen I-35 to six lanes from one-half mile north of Main Street to one-half mile south of Main Street. An estimated 75,000 vehicles travel through Norman daily on the I-35 corridor.
All the cloverleaf ramps at I-35 and Main Street will be closed.
Drivers will have to use the Robinson Street ramps to the north or the Lindsey Street ramps to the south, according to the Transportation Department.