Note: I’ve added text and a photo of the approach from the north.
The City of West Sacramento has installed a section of cycletrack (a two-way Class 4 separated bikeway) on South River Road and 5th Street in the Bridge District. Apparently completed late 2023 (shows how long since I’ve ridden that way), it is part of the Riverfront Street Extension and 5th Street Widening Project.
From 15th Street (the connection to Jefferson Blvd) north to almost Mill Street, the bikeway is separated from motor vehicles by a hard curb divider. The on-street bike lane southbound still exists, but this bikeway provides a much safer alternative. The onramp to Hwy 50 east (or Business 80 as it is designated), was an extreme hazard for bicyclists due to drivers turning at high speeds. See two photos below.


From Mill Street north to Bridge Street, the cycletrack is separated by a buffer and vertical delineators (K-71). At Bridge Street and north, the roadways returns to traditional Class 2 unprotected bike lanes. Though it would have been great to extend the curb-protected cycletrack all the way north to West Capitol Avenue, at least the truly dangerous section at the freeway onramp was fixed.

To the south of 15th Street, South River Road has more traditional bike lanes, with buffers in a few locations, as it crosses the ship channel and goes through two roundabouts.
The transitions to and from the bikeway seem a little awkward as they swoop through the intersection, but are probably not unsafe. I observed several bicyclists heading westbound to 15th Street who were not following the skip green bicycle markings, but the maneuver was not unsafe. I did not observe any bicyclists at the Bridge Street intersection.
Approaching the cycletrack from the north, the southbound traditional bike lane on the west side of 5th Street transitions to the cycletrack on the east side of 5th Street at Bridge St. Though the transition does not feel safe, I think it actually is, with signals preventing inappropriate motor vehicle movements.

