I've seen those very large, portable boxes they sometimes put up on side streets for a week or so and then they are gone. The ones with flashing lights that say "Your Speed Is:" . . . you've seen those, right? I know it helps me slow down (even though I'm going maybe 3 mph over the posted limit.)
A couple of days ago I saw a much smaller version attached to the post of the speed limit sign. I'm thinking this is a permanent thing, which is great!
Just curious if you've seen the smaller version attached to the speed limit signs . . . is this the wave of the future?
On a side note -- when I was traveling on the tollway through construction I saw many of the larger version of "Your Speed Is:" signs, which is common. What I never saw before was when someone was (stupidly) zooming by, instead of posting the actual speed limit of the driver, red lights would go off and the sign would switch to "SLOW DOWN!"