chapter 3 — signs, signals and road markings Construction signs Information and destination signs 35 These signs warn of construction and maintenance work. You must pay attention to the warnings  and obey the instructions on these signs. Obey traffic‑control persons, travel within the posted  speed, stay well back from all equipment and pass only when it is safe. These signs give information about destinations, route numbers and facilities. Here are a few  samples.  Hospital nearby Gas available ahead  Accommodation ahead Travel information ahead Primary highway marker sign Trans-Canada Highway route marker Directional sign  Destination sign —  distances are in  kilometres Crew working  — obey posted  speed limit Survey crew —  obey posted  speed limit End of  construction  zone speed limit Fine notice for speeding  in a work zone Blasting ahead  — follow  instructions on sign Follow the lighted arrow Detour ahead Soft shoulder ahead — stay off Construction ahead Traffic-control person ahead