Ohio Department of Transportation crews began work on projects in north Columbus and Delaware County Monday morning.
Crews began a $72 million project on I-270 at U.S. 23, called the “North Side Fix.”
The intersection is one of the busiest in the state, with 170,000 vehicles driving through it daily.
Construction crews will reduce the original four cloverleaf ramp design to two ramps to help eliminate traffic weaving as vehicles enter and exit the intersection.
The ramps from I-270 east to U.S. 23 south will be reconfigured with traffic lights.
Crews will also add an additional lane in each direction on U.S. 23, north of I-270, and add two northbound express lanes on U.S. 23 for through traffic.
The project is expected to be completed in 2016.
Work also began Monday on S.R. 315 at S.R. 750, or Powell Road, in southern Delaware County.
S.R. 315 will be closed at the intersection for two months so crews can build left turn lanes in both directions.
Motorists will not be able to access S.R. 750 from S.R. 315 during the duration of the project, however vehicles already on S.R. 750 will be able to pass through the intersection.
ODOT will add left turn lanes in both directions of S.R. 750 next year.