We have them on alot of bases and you would be suprised how many people do 80-90 when the sign on the thing says 25
. Heck any thing 20mph over posted is reason for them to put you in the brig till someone from the command comes to get you. They mostly give tickets for anything over 5mph but I had a friend that got a ticket for 28 in a 25.
He had to see the base majistrate(sp?) and he got reamed but afterwords with his promising not to do it again and admitting his mistake it was torn up [whew it was only 3mph].