The Transport Authority this afternoon denied claims by the bus owners that emission tests by VRT stations and its own officials were being carried out under wrong specifications.

Replying to a statement issued yesterday by the Public Transport Association, the ADT said the standards for tests on heavy vehicles were adopted from EU directives.

The ADT said that while the PTA claimed that one of the tests was carried out on 3,000 revs, the test report it enclosed did not indicate any revs.

The authority said the testing procedure here was the same as in the UK and other European countries.

It reiterated the government's commitment to replace the buses with vehicles which produced less emissions and which came in different sizes according to their routes.