The speed limit through your town is 25 MPH. Kids from the high school keep driving through town at 50 MPH. What is the better solution? Lower the limit to 20 MPH or enforce the current limit.
Install unavailable speed humps.
I'm assuming if the speed limit for the entire town is 25 mph, you live in a speed trap.
In that case, the best course of action would be to do all of civilized society a favor and bulldoze the motherfucker, widen the highway, and stop wasting everyone's time.
Get rid of the current limit, 25 is insanely slow for a legally enforced limit
Raise it to 35