Monday, August 10, 2009

Changing our driving habits

We have all seen drivers who rush from one stop light to the next, accelerating as fast as they can, revving up the engine, screeching the tires on the ground, &etc. &etc.

What do they accomplish? 2 seconds of thrill? May be another 2 at the next red light? Is it the sound of the engine revs or the screech of tires that is the more exciting part? Or is it the acceleration that throws you back against your seat back? Because those are the three (3) things that really happen when you go from zero to sixty in 3.14159..
ad infinitum seconds. The acceleration part is also available on rollercoasters. Or small planes. Or gliders. What these drivers do not realize, or do realize and do it anyway, is that the fast acceleration uses the most energy. If you were getting on a highway, it would be a good thing. But the bad part is when you have to stop. All the energy that was generated is lost as heat when the brake pads press against the wheels to bring it to a stop. Would be good if this heat could be stored somewhere to be re-used. But no one has done that yet.

What is the purpose of getting in a car and going somewhere? Is it a race? Are there prizes? Why do we drive as fast as we can when it really makes negligible difference in the time? If you have to go 10 miles and you were driving the speed limit of 65 mph you would get there in a little over 9 minutes. If you drove at 75 mph you would get there in 8 minutes.
A minute sooner. That's all. If you were going 100 miles, then the trip would take 92 minutes at 65 mph and 80 min at 75 mph. Just 10 min earlier. However, if you were going 100 miles you would probably take longer to start the trip, or stop in between for more than 10 min. In the grand scheme, the 10 mph extra gets you nothing.

1 comment:

Andrew W said...

I'm not buying it. Consider what would happen if everyone tried to save even more energy and slowed down even more? Fewer cars would make the light and the capacity of that stretch of road would be severely underutilized. The traffic jams and wasted gasolinewould be horrendous.