That's what a local municipality has done and its really frustrating. They've lowered the speed limits in the entire jurisdiction to mostly 25 with small sections of 35 on the two major arterials. Keep in mind, these are areas with 4 lanes of traffic + extra shoulders AND the sidewalks are set away further AND there is no residential on these roads. Most recently they changed a 45 section that was on the edge of town to 35 in an area that literally has no buildings on it whatsoever, nor any foot traffic. You can bet they now run radar at the speed limit sign of that newly lowered section. I've seen them. And another spot has a 35 sign that they follow with a 25 sign just a few dozen yards after that... at the crest of a hill.... that they run radar from the bottom of the hill and constantly bust people for that automatic +10 if they didn't slow down yet or notice the 2nd sign. And its mostly because a vocal minority of the oldest residents complain at civic meetings because they don't like how much the town has grown in the last 10-15 years.