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ATHENS, Greece (AP) _ Greece's highest administrative court has agreed to consider a request to block construction of a key suburban railway designed for the 2004 Olympics.

Failure to build the crosstown transport system would be a blow to 2004 planners who are struggling to find ways to deal with the city's acute traffic congestion during the games.

Athens' traffic is also a concern for the International Olympic Committee, which begins a two-day inspection of 2004 preparations on Wednesday.

The Council of State agreed to consider a petition against the rail project filed earlier this year by Athens Mayor Dimitris Avramopoulos, who said that tracks would be laid at the expense of vital road space.

The court accepted Avramopoulos' arguments that alternative routes for the rail system had not been adequately considered.

Avramopoulos has been highly criticized by the government and games organizers for taking the court action.