Dec.21 (GMM) Thailand looks set to join the F1 calendar in 2015.
It was believed the capital Bangkok was targeting its inaugural Grand Prix in 2014.
But F1 chief executive Bernie Ecclestone has been quoted in the Wall Street Journal as saying the first Thai street race, staged under floodlights, will be in 2015.
It is believed Red Bull, whose co-owner Chalerm Yoovidkya is from Thailand, is involved in the preparations.
"I can say that it is almost 100 per cent certain that Thailand will host an F1 race," said the energy drink's representative Michael De Santiesteban, who reportedly met with Ecclestone last month.
"With Thailand on the calendar," he added, "a current race is likely to be removed."