Parking a Loaded Tanker Overnight
You are driving a cargo tank loaded with 6,000 gallons of a Class 3 flammable liquid (flash point well below 100°F). It's 9:30 p.m., you're 40 miles from your delivery, and you're out of legal driving hours. The nearest truck stop is full. Your options: (A) park on the shoulder of an interstate ramp, (B) park in a closed gravel lot behind a shuttered restaurant about 200 feet from a residence, (C) park at a 24-hour diner lot next to the building, or (D) keep driving the 40 miles 'since it's close.' You are alone, and there is no safe haven designated nearby.
1. Evaluate each option against the parking rules for a loaded flammable-liquid tanker.
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(A) Shoulder of an interstate ramp: no. Parking a loaded flammable-liquid tank on a roadway shoulder exposes it to being struck and is not a permitted parking location. (B) Closed gravel lot 200 feet from a residence: generally no. A loaded tank of Class 3 liquid should not be parked within a specified distance of a residence, bridge, tunnel, or place where people congregate; 200 feet is inside the concern zone, and a closed lot offers no security or supervision. (C) Diner lot next to the building: no - parking next to a building where people are present is exactly what the rule guards against. (D) Keep driving: no - you're out of hours, and fatigue plus a flammable tank is a bad combination. None of these is clearly compliant, which is the point of the question.
2. What is the correct judgment call here, given that none of the options is obviously right?
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The right move is to stop safely and legally rather than force a bad option. That means finding a permitted location: a designated truck stop or rest area, or a secure, attended lot away from residences and places of assembly, and parking so the vehicle is not exposed on a shoulder. If the only realistic option is the closed lot, you weigh distance from the residence, whether the lot is fenced/attended, and whether you can park away from the structure - but you do not simply pick the least-bad spot and sleep. The exam-tested judgment is: when no option is clearly compliant, you keep looking for a compliant place to stop; you don't rationalize a shoulder or a building-adjacent spot because you're tired and close to delivery.
3. If you do stop, what should you do before you shut down for the night?
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Set the parking brake, chock or otherwise secure the vehicle, and make sure the tank and fittings are secure. Keep the shipping papers accessible and know what's on board. Park facing an exit if possible so you can leave without backing a loaded tank. If the location allows, stay with the vehicle or keep it in sight, and note where you are. The security dimension matters too - a loaded tank is an attractive target, so a well-lit, attended, visible spot beats a dark closed lot. Document the stop and the reason (out of hours) in case the delay is questioned.