The proposed Circuit of Wales development, which plans to one day host MotoGP, has been put on hold by the Welsh Government.
Outline planning permission for the £280 million project was granted by councillors earlier this month.
However the Welsh Government wants more time to decide if it should inspect the plans and has issued a 'holding direction', which prevents the council from granting final planning permission, although the council can continue to process the application.
Michael Carrick, Chief Executive of Heads of the Valleys Development Company, told the BBC: "We are very confident in the outline planning application we have submitted and are delighted that we received the unanimous backing of Blaenau Gwent County Borough Council.
"The Welsh government has asked for more time to look at the project and we're happy to continue engaging with them and all stakeholders to ensure we address, as much as possible, the specific concerns they have."
Construction of the 3.5 mile circuit, plus Motocross and kart tracks, retail complexes and technology park is scheduled to start later this year, with an estimated completion date of 2015-16.
Prof Garel Rhys, chairman of the Welsh Automotive Forum, confirmed that the circuit is 'mainly aimed at top class motorcycle racing although it could be used for cars too'.