I'm not telling anyone what to do, but these are some of the reasons I stopped driving like a bat out of hell everywhere I go.

If you were going to drive, say 70 mph, but you are in a hurry, so you decide to drive 85 mph, then you'll get there in 70/85 = 82% the time. Multiply that by 60 minutes and you get ~49m 25s. So for every hour you drive at 85 mph, you're saving ~10.5 minutes. If your commute would have been 30 minutes, then you save yourself a bit over 5 minutes in travel time.

Most people going an extra 5 mph over the limit would see a reduced effect even from that above. 70/75*60 min = 56 min. Driving 5 mph above the 70 mph limit only saves you 4 minutes for each hour you're driving at 75.

The kinetic energy of your vehicle increases as the square of the velocity, but the ability of your brakes to reduce your speed is predominantly a linear process. It's really complicated. A google search for "stopping distance" will show you that the faster you're going, it takes much more distance to stop you.


Low benefit for high risk, IMO.