The Federal Government has announced the Great Eastern Highway widening project has been completed nine months ahead of schedule.

The $280 million project saw the stretch of highway between Kooyong Road and the Tonkin Higher in Perth widened from four to six lanes.

Federal Minister for Transport, Anthony Albanese, said the project will ease congestion along the Highway by increasing its carrying capacity between Kooyong Road and the Tonkin Highway by some 70 per cent, from 50,000 to 85,000 vehicles a day.

“It will also improve access to the City's Airport and surrounding areas, improve safety for local residents and other regular users of the Highway, and deliver better facilities for pedestrians and cyclists,” Mr Albanese said in a statement.

The widening of the Great Eastern Highway was jointly funded by the Federal ($224 million) and Western Australian ($56 million) governments. These works will complement other improvements to the Highway, including the new interchange at the intersection with the Roe Highway which was completed last year.