I just read an account from a feral cat TNR manager in your area describing themselves as having to divert around a dozen feral cats, some directly in the way of traffic while going to a meeting. We've recently quoted Dr. Julie Levy, manager of Operation Catnip as saying she found the cats lived an average of 7 years after being spayed and brought back to their territory.
If these TNR practicers themselves are to be believed, it appears to me you will be hip deep in cats, if you aren't already. Meanwhile, the pets continue to die under the wheels of cars and kill our birds and other fauna. I say get the pets out of traffic and out of the wild!