I’ve REALLY got the hump….

Recent research by the AA shows that road humps double the carbon dioxide emissions and fuel consumption by forcing drivers to brake and accelerate repeatedly. A car that achieves 58.15 miles per gallon travelling at a steady 30mph will deliver only 30.85mpg when going over humps.

The results, calculated by averaging the performances of the two cars, also showed that reducing the speed limit from 30mph to 20mph resulted in 10 per cent higher emissions. This is because car engines are designed to be most efficient at speeds above 30mph.

A motorist who observed the speed limit on one mile of 20mph road during a daily journey would produce an extra tonne of CO2 in a year compared with driving at 30mph on the same stretch. The AA’s president, said: “Humps are a crude, uncomfortable and noisy way of slowing people down and this research has shown they are also environmentally damaging.”

Previous research by the Transport Research Laboratory found that air pollution rose significantly on roads with humps. Carbon monoxide emissions increased by 82 per cent and nitrogen oxide by 37 per cent.

So there you have it, the proof that speed humps apart from destroying our cars and injuring our backs, are also destroying the environment.

Well done, once again,  government “experts”.

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2 Responses so far »

  1. 1

    dexey said,

    The alternatve argument is that cars shoud only be allowed where they can do 30 plus mph (for efficiency) and not where soft skinned road users are.
    If you don’t like the humps stay off the roads that have them.

  2. 2

    No. The alternative argument is that other means are required to promote road safety in residential areas, where tha “soft skinned road users” are.

    Blocking “rat runs” helps. So would by-passes, if funds and space permit.

    What ever happened to the “Tufty Club”… which did an excellent job teaching children road safety?

    Very few residents like their humps, because of the way that traffic noise increases and in some intense cases building damage results.

    I removed all my humps 4 years ago, and replaced them with width restrictions and chicanes. Traffic now moves slower than it did when we used humps. That’s on a few hundred metres of private road, but maybe something similar could be developed for public roads.

    Finally… if I should stay off the roads that have speed humps, why should my road tax pay to maintain those roads?


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