Thursday, May 6, 1999 Published at 08:30 GMT 09:30 UK
Car emissions tests under fire
Tens of thousands of cars breach the pollution limit
One in five vehicles in the UK emits illegally high levels of pollution in spite of annual tests that cost owners more than £100m a year, according to a report.
The report found the standard of testing in garages is often low, roadside tests can produce inconsistent results and it can be difficult to get access to exhaust systems on lorries.
A check on the exhaust has been part of the annual MoT roadworthiness test for the last five years. And the auditor general, Sir John Bourn, reported to Parliament that this has helped to reduce emissions of carbon monoxide. But more than 10% of vehicles still cause half the pollution on Britain's roads.
Spot checks 'unfair'
Eight local authorities are trying out a scheme whereby testers can impose on-the-spot fines at the roadside.
But motoring organisations say these are not fair because the MoT test differs from the roadside check and a driver who passes an MoT in the morning, can fail a roadside test in the afternoon.
The Automobile Association (AA) complained that the NAO report had confirmed its fears that drivers are not treated fairly.
AA policy manager Bert Morris said: "We warned the government before the trials started that there was a risk drivers could be penalised unfairly because the system worked against natural justice.
"Responsible drivers who do their best to properly maintain their vehicle are treated in exactly the same way as irresponsible drivers who do not. We must tackle grossly polluting vehicles, but to use a system which is so badly flawed is counter productive."
Testing does seem to have worked to an extent. In the year after it was introduced in 1994, there was a 14% reduction in emissions. Since then a lot of the dirtier vehicles have been weeded out so testing has had less of an impact.
The government's Vehicle Inspectorate is now considering ways to make the test easier for garages to apply, and from September 1999 all heavy goods vehicles will be tested with a meter.