We have had this issue for a decade in my So Cal neighborhood. Nothing has changed over the decade despite all of the above suggestions. Counting down the next two years until we leave So Cal.
We have the same issue here with street racers. However, our local PD is VERY involved and has an actual enforcement team specifically for this issue. They have impounded and cited numerous cars/drivers and arrested several. The ones in our city are serious...essentially drag racing on our straightaways in their exotic sports cats at speeds up to 150mph. They have caused numerous fatal accidents. The cops had no choice but to really start cracking down. A lot of smaller racing clubs from other parts of So Cal come to our town because we have a lot of long streets that are straight and at night, essentially no traffic. They tend to race between 11pm and 2am. We have one of these straightaways very close to our home and hear these cars a few times a month. We also live close to an on ramp to I-5 and they like to race there too. It's probably the only thing I don't love about where we live.