They'll also be building stops along the way, including one on the outskirts of Pacific Beach. It's on a largely forgotten stretch of Morena Boulevard that runs parallel to Interstate 5, near industrial buildings and city storage lots.
But people could soon have a reason to call it home.
New documents show the city may re-zone 51 acres near the trolley stop, meaning mixed-use apartment buildings, biking and walking paths -- essentially, transit-oriented living.
People can live near the trolley stop and use it to get to work, north or south.
Joe Sopher lives on the hill above the future stop, just south of Balboa Avenue. He was surprised the San Diego Association of Governments (SANDAG) didn't put it immediately north of the main road into Pacific Beach.
"Over there they could build restaurants and strip malls and stuff so there's something they could do," he said.
But it seems they could build all of it anyway, with the stop a short walk or bike ride away.
A city spokesman didn't immediately respond to a request on which 51 acres it is eyeing. The city will hold a public meeting about this at 6 p.m. July 18 at the Pacific Beach Taylor Branch Library.