There are bilingual information panels all along the road and emergency telephones at Kms 135, 201, 247, 301, 444 and 504. At the time of research, there was no cell service along the route.
At Km 6, a tourist office operates 24 hours a day throughout the year. It's highly recommended that you stop; for safety reasons, everyone traveling north should register here. It's also worth going inside since you can pick up booklets and pamphlets that detail the geological and geographical features along the way and contain information about forest fires.
The Société de Développement de la Baie-James (SDBJ) is the organization responsible for maintaining the main roads in the James Bay region. It publishes reports of road conditions, including the conditions along the Route de la Baie James, on its website (www.sdbj.gouv.qc.ca/en/james-bay-territory/road-network-conditions/#james-bay-highway-matagami-radisson).