Deer at 200 Feet
At 22:30 you are driving a 33,000-lb GVWR straight truck with a 12,000-lb load at 55 mph on a two-lane Kansas highway. The asphalt is dry, and you are using high beams. A deer steps onto the right shoulder about 200 feet ahead and stands facing the road. The right shoulder is 4 feet wide, then a 3-foot ditch and a fence. An oncoming car is about a quarter mile away with its headlights on. Your truck has air brakes and good tires, and the load is palletized and secured. You have been driving for 6 hours after an 8-hour break. The speed limit is 65 mph, and traffic behind you is light. You must decide what to do in the next second.
1. Estimate whether you can stop in 200 feet and choose your action.
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Stopping in 200 feet is unlikely. At 55 mph you are moving about 81 feet per second. A typical perception and reaction time of 1.5 seconds covers about 121 feet before the brakes are fully applied. That leaves only about 79 feet for braking, while a loaded truck at 55 mph on dry pavement needs far more than that - roughly 200 feet or more of braking distance depending on conditions. The practical action is controlled braking: apply firm, steady pressure, keep the truck straight, and stay in your lane. Do not lock the wheels or swerve sharply. If impact is unavoidable, hitting the deer is usually safer than rolling the truck into the ditch or crossing into the oncoming car.
2. Why is swerving a poor choice here, even though the deer is in your path?
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Swerving puts the truck into a narrower margin than braking does. To the right are a 4-foot shoulder, a 3-foot ditch, and a fence - a recipe for a rollover or a fixed-object crash. To the left is an oncoming car only a quarter mile away, which closes quickly at highway speed. A loaded straight truck has a high center of gravity and does not change direction like a passenger car; a sharp swerve can cause loss of control or a rollover. Controlled braking keeps the tires rolling and the steering available, and it reduces speed before any impact. The safest choice is to stay in the lane and accept a possible deer strike rather than create a larger crash.
3. What should you do immediately after the event, whether you hit the deer or stop short?
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Move to a safe position off the traveled lane if the truck is operable, turn on hazard lights, and check for injuries. Do not stand in the lane. Inspect the truck for damage, especially the front end, air lines, tires, and lights, and check that the load has not shifted. Report the crash or animal strike to law enforcement as required, and notify your dispatcher. If the deer is in the road, do not approach it; injured animals are dangerous. If the truck is not safe to move, keep passengers and other people away and call for help. The post-event check matters because a deer strike can damage an air line or cooler without immediately stopping the truck.