The California Department of Transportation announced Friday that construction for a new carpool lane along a section of the 10 Freeway lane has begun.

The project will create about five miles of road going in both directions of the freeway between Citrus Street in West Covina and the 57 Freeway.

It is an effort to better manage the flow and congestion of traffic between Los Angeles and San Bernardino counties, which are approximately 40 miles apart, said Caltrans Patrick Chandler to KPCC.

"Instead of people having to get in and out and having to weave into traffic to get in and out, it's better that they're able to have one continuous flow so if they're in that carpool or riding with their coworkers to work, then they're able to stay in that lane all the way versus having to weave in and mix in with other traffic, they're able to be separated so the flow is much easier," he told KPCC.

The new carpool lane is not the same as Metro’s FasTrak express lanes on some freeways and people will not have to pay to use them.

More than 200,000 motorists travel through the San Gabriel Valley area daily, Chandler said.

Soundwalls will also be built along a four-mile stretch of those lanes to reduce freeway noise in nearby neighborhoods.

The funding for the $195 million project will come from a combination of local, state and federal funds, he said, and is expected to be completed by 2021.