There is no doubt that traffic and pollution from vehicles have become huge problems, both in cities and on motorways. Solving these problems is likely to need more than a simple rise in the price of petrol. While it is undeniable that private car use is one of the main causes of the increase in traffic and pollution, higher fuel costs are unlikely to limit the number of drivers for long. As this policy would also affect the cost of public transport, it would be very unpopular with everyone who needs to travel on the roads. But there are various other measures that could be implemented that would have a huge effect on these problems. To tackle the problem of pollution, cleaner fuels need to be developed. The technology is already available to produce electric cars that would be both quieter and cleaner to use. Persuading manufacturers and travelers to adopt this new technology would be a more effective strategy for improving air quality, especially in cities.