State Road 66 over Green River Road | Bridge Replacement
EVANSVILLE, IN—This interchange modification project was designed to reduce traffic congestion. The project consisted of reconstructing the existing urban diamond interchange to provide a single point urban interchange at SR 66 and Green River Road. The construction included raising the grade of the SR 66 roadway approximately 3 feet, partial reconstruction and widening of the existing ramps, constructing a new 3 span bridge, vertical extension of the existing Mechanically Stabilized Earth Walls (MSE Walls), and constructing additional turn lanes on Green River Road.
The single point interchange required a bridge that would span the entire intersection and provide sufficient width to permit dual left turn lanes on to and off of Green River Road. The 3-span continuous composite bulb-tee beam structure carrying SR 66 over Green River Road is approximately 318 feet long and utilizes post tensioning to reduce construction depth. The interior supports consisted of integral post-tensioned concrete straddle bents. Similar to the previous bridge, the new structure consists of twin structures, one for eastbound traffic and one for westbound traffic.
Maintenance of Traffic
The construction was done in phases to maintain traffic on SR 66 and Green River Road.