Your load is placarded and no state or tribal routing designation applies to it. What does federal regulation say about the route, and what does the carrier owe you if the load is explosives?

Explanation

A motor carrier carrying hazardous materials required to be placarded or marked under 49 CFR 177.823, and not subject to a routing designation, must operate the vehicle over routes that do not go through or near heavily populated areas, places where crowds are assembled, tunnels, narrow streets or alleys, except where the carrier determines that there is no practicable alternative, that a reasonable deviation is necessary to reach a terminal, points of loading and unloading, facilities for food, fuel, repairs, rest or a safe haven, or that a reasonable deviation is required by emergency conditions such as an established detour or a law enforcement officer directing an alternative route. Operating convenience is expressly not a basis for deciding whether the main rule is practicable, which is what keeps the exceptions from swallowing it. Before a vehicle containing Division 1.1, 1.2 or 1.3 explosives is operated, the carrier or its agent prepares a written route plan complying with the section and furnishes the driver a copy, although the driver may prepare it as the carrier's agent when the trip begins somewhere other than the carrier's terminal. The correct option states only the first of the three determinations; the other two, the reasonable-deviation list and the emergency-conditions case, are set out above and are part of the same rule. The wrong options each replace the rule's own standard with an easier one, a shortest-route test, an interstate-mileage mandate, or the claim that the absence of a designation leaves routing unregulated.

Source: 49 CFR 397.67(b) and (d)