Transport Minister Saksayam Chidchob, said the free service was set from Sept 3 to 8 that would be holidays in lieu of the previously cancelled Songkran holiday.
Toll-free will be on Highway 7 (Bangkok-Pattaya inter-city motorway) and Highway 9 also known as Kanchananaphisek Road on its sections from Phra Pradaeng to Bang Khunthian and from Bang Pa-in to Bangphli.
The Highways Department waives tolls on the highways to help people cut their cost of living.
The minister also ordered the department to facilitate traffic flows during the four-day holiday. (TNA)