The survey, conducted by TransportEnergy, a division of the Energy Saving Trust, shows three-quarters of respondents also strongly believe that vehicles producing high levels of emissions should not be allowed through certain urban areas.
Three-quarters of respondents also said they would consider driving a cleaner fuel vehicle themselves. However, despite this genuine wish to protect the environment, over half the respondents still have little or no awareness of the grants available for converting to cleaner fuels or for fitting emissions-reducing equipment to fleets.
Colin Matthews, head of customer services for TransportEnergy, said: 'The congestion charging programme now operating in London is being monitored by numerous local governments and is proof that key urban centres are looking to reduce their traffic flow and improve their local air quality. Fleet and haulage companies must act now to curb their emissions if they are to avoid costs and exclusions that may seriously damage their ability to do business.'