The CHP is investigating a single-vehicle rollover collision on SB-680 just south of Olympic Blvd. in Walnut Creek.
The older black Infiniti sedan was speeding and swerving before the solo-vehicle crash, according to the CHP.
When the CHP arrived on scene, they found the driver had fled the scene, apparently on foot. The driver has not been located, but they do not believe he was ejected from the vehicle.
Use caution if you’re in the area.