These signs warn of unusual temporary conditions such as road work zones, diversions, detours, lane closures or traffic control people on the road. They are usually diamond-shaped with an orange background and black letters or symbols.
Closed lane
Construction 1 km ahead
Road work ahead
Survey crew working on the road ahead
Lane ahead is closed for roadwork
Entering Construction zone
Pavement has been milled or grooved
Flash light on the arrow show the direction to follow
Temporary detour from normal traffic route
Do not pass the pilot vehicle or pace vehicle bearing this sign
Reduce speed and prepare to stop
Follow detour marker until return to regular route
Enforces doubling the HTA fines for speeding in a designated construction zone when there are worker present