It wouldn't surprise me. I've made it a mission to fight a red curb parking violation and have taken pictures of multiple cars parked illegally where I did since Oct. 1st. Last week I found the curb at 2100 avenida de la playa marked with some numbers that weren't there before and the middle of the street with signage as well. I showed the picture to someone at the S.D department of street maintenance and she said all those marking are from a utilities company. Below is a picture of that location.
