Groundbreaking for the Clinton Keith Bridge Widening project is scheduled for Friday.
The groundbreaking is set for 10 a.m. behind USA Gas, 23905 Catt Road.
Slated to attend are the Riverside County Board of Supervisors, Wildomar city officials and representatives of the Riverside County Transportation Department.
Construction is expected to begin in April.
The project should take 18 months to complete and will entail the bridge's widening from two to six lanes.
Additionally, sidewalks will be installed in both directions, in addition to signal lights, a center lane and improved freeway entrance and exit ramps.
Seismic upgrades will also be included, officials said.
Officials warn that during construction, motorists should expect delays along Clinton Keith Road.
To assist the public in navigating the area, the city plans to keep residents informed about traffic conditions, detours and news through a soon-to-be-launched Facebook page and via the city website.
The widening project was made possible through the Transportation Uniform Mitigation Fee Program.