When may a placarded vehicle be driven near an open fire?
Correct answer: C – After the driver verifies that it can pass safely without stopping
Federal regulations prohibit operating a motor vehicle containing hazardous materials near an open fire unless the driver first determines that the vehicle can pass safely without stopping. The Illinois CDL Study Guide presents the same condition in its hazardous-materials route guidance. Merely carrying nonflammable cargo or estimating a distance does not replace this required safety determination.
Source: Illinois CDL Study Guide — § 9.6.5, “Route Restrictions”, 49 CFR § 397.11(a) — Fires

