TF写作真题第044套（nt017）

NT_017

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综合写作NT 017音频

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Regulating the speed of road vehicles by setting speed limits is a common practice: road speed limits are in effect in almost every country. However, some people believe that the typical speed limits are still too high, and suggest that lowering current speed limits would result in significant benefits.

First, people who support the lowering of speed limits argue that it would reduce the number of serious accidents. There is good evidence for this claim. In 1974, the United States lowered the speed limit on highways in the interstate system from 70 miles per hour (about 110 kilometers per hour) to 55 miles per hour (about 90 kilometers per hour). Studies showed that there was a clear and steady decrease in the number of serious accidents in the ten years after the speed limits were lowered.

Second, it is claimed that lowering speed limits would help address a serious environmental concern: poor air quality. Vehicle emissions are a serious source of air pollution. Experiments show that lowering speed limits can lower air-polluting emissions by vehicles. For this reason, a few states in the United States and several countries in the European Union have introduced lower speed limits with the expectation that this will cut automobile emissions and significantly improve air quality.

Third, it is claimed that reducing speed limits would provide an economic benefit, because it would save drivers money on fuel. Fuel prices are rising, and the faster people drive, the more fuel their vehicles use. Researchers have proven that drivers can decrease the amount of fuel they use by reducing their speed: for example, if a vehicle is driven at a speed of 80 or more kilometers an hour, decreasing the rate of speed by 8 kilometers per hour achieves a 5 to 10percent fuel savings.

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