The city of San Jacinto is widening the Ramona Expressway over about a 10-month period beginning Monday, Aug. 11, from the two existing lanes to five lanes.

Sean Motlagh, project manager in the City Engineering Department, said the project will modify traffic signals, improve drainage and add a bike path, too. The project is between Eagle Road and Lake Park Avenue/Main Street in San Jacinto, and will cost $3.9 million to build with a final cost of $5.2 million that includes plans and engineering costs.

Motlagh said though traffic will not be blocked, commuters from Idyllwild “may want to use alternative routes.” The project is expected to end in June 2015.