Per CDOT, Construction Bid Opened

It's prolly one of those mobile signs like Jeffco puts up occasionally to warn you of your current speed. If you are a certain speed over, the message changes from your speed limit to something like "slow down". Jeffco puts them up for a week and then takes them down while they patrol and hand out tickets.

It could also mean installing temporary speed bumps. We use the temporary speed bumps on water main breaks to slow folks down because some people just can't read the signs but are sure to slow down to avoid spilling their drinks. The rumble strips just remind you that you are in a construction zone, but if they are spaced a certain distance apart, the trained ear can tell if a vehicle may be aproaching a bit too fast.

Aren't the rumble strips the grooves in the pavement to let you know you are not in the lane?

Martin Ent Inc wrote: Aren't the rumble strips the grooves in the pavement to let you know you are not in the lane?

Yes, But they also put them across traffic like they had in the SB lanes just before the Shaffers Crossing project. When they go across traffic they are called 'fart strips'.

they have them in Golden where the Elk cross, very gentle rumble strips across the road, widely spaced, and painted like a cattle guard. I am not sure the elk understand. But they were standing there Tuesday morning, contemplating their options. Meanwhile all the Elk motion detector lights were off. No Elk were harmed... that I know of

The speed monitoring system might be so that they can display the average speed on their website (cotrip) ... I use it to help decide when to come home from Summit County.