That means it's been running since this morning.
From this comment that proves human nature is what it is:
I drove 380 northbound today. Everyone was doing about 8 to 10 over. At the first speedcams, everyone slowed down. About a 1/4 mile later back to 8 to 10 over. At the second speedcams, everyone slowed down again. Then once past the cams, back to 8 to 10 over. On the southbound lanes, everyone was doing 8 to 10 over all the way through CR. So where are all these slow cars the police have been talking about?So with another camera up, a driver could get 3 tickets in less than 10 minutes and not know about it for weeks.
Remember, it's all about safety, safety, safety.