Hi, something went wrong here and in some of your (and https://www.openstreetmap.org/user/atticquilt 's, who it looks like you're working with?) other edits to San Pablo Ave.  There were a bunch of random-looking segments of streets that were deleted here, and multiple overlapping crossing ways and sidewalks created over several changesets.  
I reverted the most problematic changesets, but it seems like there's a problem in your mapping process somewhere.