Ride-hailing service and technology firm Lyft Inc. is expanding its Lyft Line offering to the San Diego market, matching passengers heading along similar routes into the same vehicle starting during the week of April 11.

A statement from San Francisco-based Lyft said the service, expected to be available in 15 U.S. metro markets by April 15, is aimed at making rides more affordable and reducing traffic congestion by taking cars off the road.

According to the company’s website, users will be able to select “Line” on the Lyft mobile app, and be matched up within minutes with vehicles taking other riders along similar routes. Shared rides will be priced at a discount.

In addition to San Diego, the company is launching the service during the same week in Denver, Philadelphia, San Jose, Seattle and Newark. Officials said the extension of the Line service follows the recent launch of Lyft Carpool, which helps commuters match up ride shares to work and fills otherwise empty seats in vehicles heading to the same location.