Slow Down, 171°

Reduce your driving speed when conditions allow. Air resistance is proportional to the square of your speed, so slowing from 100Km/h to 90Km/h reduces your car's air resistance by nearly 20%.

For our US colleagues, slowing from 65mph to 55mph reduces your air resistance by 28%.

Combine this with slower acceleration, less braking and better anticipation will reduce your fuel consumption by 10 - 15%.

4 comments about this action

Great idea and such a no-brainer. Slow down people!!!

last month

I like the idea of going slower, generally. If we are hurtling toward an imaginary finish line, it certainly doesn't look like there's much of a winner's trophy!

last month

Actually air resistance is proportion to the **cube** of speed.

However, if you amortise that over distance travelled, the air resistance work per mile is **squared**.

In other words, going 100kph has 37% more wind resistance than going at 90km/h. However you are going faster so are spreading that over more miles. Thus the exta wind resistance energy per mile is 23%.

Going slower is also a lot safer because you get better reaction times. The energy in a moving vehicle is also proportional to the square of the speed. Therefore faster == more damage.

last month

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