First of all, consumers and economy would be victimized by such measures. The number of cars in a country directly depends on the proportion of the population affluent enough to own cars. As a result, raises in gas price could invoke hard feelings among this segment of people but would not drastically change their behavior in using cars. Even if the number of cars on road is reduced due to higher gas cost, this is not the best way to solve traffic problems. Such policy would hurt the auto industry, place higher costs on current and prospect car owners, and undermine the economy of a nation. In the long run, the final way out could be the construction of better roads and more effective use of available transport facilities.
Secondly, there is evidence that waste gas from cars is not the leading cause of air pollution. The culprit may be the discharge of polluting substances into the atmosphere due to the rapidly growing manufacturing industry. As a result, reduction of the number of cars would not return us a blue sky and fresh air. We could better handle this problem if we could increase control over industrial waste discharge and adopt more environmental friendly materials and production equipment.
Finally, other measures like the application of cheaper and cleaner energy resources could also be a better solution. For example, we now have the ability to make cell-powered or even solar-powered cars. Such energy is completely clean and plentiful. However we still have a very long way to go to turn such technologically possible into afford able and practical products.
To conclude, it is not the best way to control traffic and...