People travelling on the Asian Highway along the Bangpa-in-Ang Thong road section will be among the first to experience driving at a maximum speed of 120 kilometres per hour, Transport Minister Saksayam Chidchob said on Thursday.
The maximum speed limit for this particular section of the highway was published in the Royal Gazette on Wednesday.
It said that private car drivers using the outermost lane of the highway will soon be required to drive at no less than 100 kilometres per hour but no more than 120km/h.
The speed must be maintained unless the lane is hindered, hampered by poor visibility or obstructed, it said.
However, only certain types of vehicles may go up to 120km/h, according to the Gazette.
Sections of the highway with the 120-kilometre per hour speed limit in force will be announced by the Transport Ministry.
It will also erect speed limit signs along the highway to make the rule clear to road users.
Mr Saksayam said the Transport Ministry is expected to make another announcement on the speed limit on Monday.