Tunnel Restrictions and Hazardous Materials Routing
You are driving a tanker truck containing 8,000 gallons of gasoline (UN 1203, Hazard Class 3, Packing Group II). Your route requires you to pass through a major city. The city has a tunnel that is 1.5 miles long. The tunnel is posted with a sign that says 'No Hazardous Materials' with an exception for 'flammable liquids in quantities less than 1,000 gallons'. Your dispatcher tells you that the tunnel is the only practical route and that other drivers have used it without incident. You also see that there is a railroad crossing just before the tunnel entrance. The crossing has a stop sign and a gate, but the gate is currently up. You are carrying 8,000 gallons, which is well above the 1,000-gallon exception.
1. Can you legally drive through the tunnel with this load? What are your options and what should you do?
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No, you cannot legally drive through the tunnel with 8,000 gallons of gasoline because the tunnel restricts hazardous materials and only allows flammable liquids in quantities less than 1,000 gallons. Your load exceeds that limit. The tunnel is a restricted route for hazardous materials. You must not enter. Your options are to find an alternate route that bypasses the tunnel, or to obtain a permit if the city allows it (but the sign indicates a prohibition). You should contact your dispatcher and explain the restriction; you must not follow the dispatcher's instruction to violate the law. You should plan an alternate route that avoids the tunnel, even if it is longer. You must also consider that the alternate route may have its own restrictions (e.g., other tunnels, bridges). You should document the situation and inform your company. The driver is responsible for knowing and obeying tunnel restrictions.
2. As you approach the railroad crossing before the tunnel, what procedures must you follow? The gate is up, but you see a train approaching in the distance.
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At a railroad crossing, you must stop if the gate is down, if a train is approaching, or if there are flashing lights or a flagger. Even if the gate is up, you must still look and listen for an approaching train. Since you see a train approaching, you must stop and wait until the train has passed and the crossing is clear. You must not proceed until you are certain no train is coming. You should also ensure that you have enough space to completely clear the crossing before proceeding, especially with a heavy tanker. You should stop at the stop line or, if none, at a safe distance from the tracks. You must not shift gears while crossing the tracks. After the train passes, you should look both ways again and proceed only when safe.