Help removing city tree blocking RV/Trailer parking.

There is a large city pine tree at the edge of my parents property by the street. It prevents their 32' 5th wheel from being able to get in the backyard. It nearly impossible to back in my 22' toy hauler without using a trailer mover.

They have tried to contact the city in the past with no luck.

Has anyone ever had to deal with a similar situation? Any information would help.

We are located in southern CA.

Thank you for your time.