THE NSW government has scuttled reports that B-triple trucks will be trialled between Sydney and Melbourne.

Roads and Ports Minister Duncan Gay said B-triples already operated on select freight routes in western NSW but they were a long way off a decision on whether B-triples would be trialled on the Hume.

He said it would not happen in 2013.

He also scuttled reports that B-triples could be allowed on the Pacific Highway between Sydney and Brisbane or on suburban streets.

His statement follows a Fairfax report that a trial of the 35m-long trucks on the Hume highway could begin once a bypass at Holbrook was finished in mid-2013.