Unless the damage is caused by a official street trees. The fronting property owner is responsible for the maintenance and repair of there sidewalks. Sec 5610- of the Calif State Streets and Highway Code and 12.04 of the Oakland municipal code. Try contacting Oakland Code and Blight enforcement 510-238-3381. It may take a few calls. The PWD will not do the work to get it fixed. The more concerned neighbors and parents that file complaints the better.

Thank you for the response and information.
is there a way to know if these are "official street trees"?
Will reach out to the enforcement folks.
Should i ask people to each submit a 311 or call Blight Enforcement the number?

You have submitted the 311 complaint. Code enforcement seem to react to numbers of complaints. Code enforcement should be able to figure that out if they are city trees. Most of the damage looks like a really poor concrete job to start with. I have some numbers when the city made us replace our damaged sidewalks. PWD Bureau of Engineering and Construction, Right of Way Management 510-238-3651, 510-238-6367 and 510-238-7288 these numbers are from 2015. Good luck.

Thank you for your request. According to our system, we already have an open service request of this kind at this location. Your request has been combined with service request #414180. If you would like to check the status of the request, please contact OAK 311 at 510-615-5566 or OAK311@oaklandnet.com.