Update: Power has been restored.
A power outage knocked out Redwood City traffic lights at four intersections, causing traffic congestion, police said at 5 p.m. Saturday.
The department recommended that drivers avoid these intersections:
-- Maple Street and Veterans Boulevard
-- Roosevelt Avenue and El Camino Real
-- Jefferson Avenue and Marshall Street
-- Spring Street and Chestnut Street
Power was expected to be restored by 6:45 p.m., police said, citing a PG&E estimate.