![]() Q: So at 30 mph, a vehicle is traveling less than 15 yards per second? If feet, there are 5,280 feet in a mile?) Q: And there are 1760 yards in a mile? (The witness is using yards here. You would agree that at 30 mph a vehicle is traveling at 2 miles per minute. Q: Then you have to close in and underscore how the defendant is contradicting himself/herself the court has taken judicial notice of how far vehicles can travel over time at given speeds. Q: How long was it until impact after you saw the vehicle? You can't even offer an estimate?Ī: I don't know. Q: When you saw the Plaintiff, how far away was he from your vehicle?Ī: I'm not sure. Why? Because the longer a visual estimation takes, the slower the vehicle must have been traveling. This typically works to the victim's advantage, particularly with respect to speed. The range of responses is laughable and this is what lawyers get from fact witnesses. You can also figure this out by just asking someone to estimate how many feet a vehicle travels in one second while driving 65 mph. In one study, participants who viewed a thirty second event gave an average estimated duration of 150 seconds, 500% longer than it actually took. So you need to be able to calculate how far a vehicle will travel in a second at any given speed.Īs any accident reconstruction textbook will underscore, people usually overestimate the time it took for a car accident to unfold. ![]() In a motor vehicle collision where the parties dispute liability, they usually are disputing the time, speed and distance of the vehicles.
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