This is the same stretch I reported about a month ago. It's terrifying as a wheelchair user!

Try calling PWD 238-3651 Bureau of Engineering & Construction, Right of Way Management. I believe the empty lots are the City's. State law and local ordinances hold the fronting property owners responsible for sidewalk maintenance and repair ( Section 5610 of the Calif State Streets and Highway Code and Section 12.04 of the Oakland Municipal code ).