This is an aerial view of I Street bridge on September 23, 2020.
Built in 1911, the historic bridge has a vertical clearance of 14 feet 8 inches (4.47 m) and was originally part of State Route 16, according to Wikipedia.
It also has two sidewalks -- one on either side of the road.
The lower level of the bridge provides rail access to Sacramento from the south and west; the upper level is for cars.