Work zones and stopped vehicles
Orange signs, flaggers, and flashing lights can change the lane plan quickly. Slow early and leave room to move over.

Temporary controls come first
Obey orange signs, cones, barriers, and flaggers even when they conflict with the normal lane arrangement. Expect abrupt closures and workers close to moving traffic.
Move over for flashing lights
When a police, emergency, tow, or identified maintenance vehicle is stopped on the shoulder with flashing lights, move into the farthest available lane if you can do so safely.
If you cannot change lanes
Puerto Rico law requires a substantial speed reduction when a safe lane change is not available. Leave extra following distance and avoid stopping beside the response vehicle.
Treat closure notices as live data
Construction schedules and lane closures expire. Check the ACT live traffic map for current conditions and follow the signs in front of you rather than relying on an old advisory.