Inter-provincial bus services have been ramped up to accommodate people's journeys home following the cremation ceremony for the late King on Thursday.
Transport Co CEO Jirasak Yaovatsakul said people began heading back to their native provinces on Thursday night and about 120,000 were believed to have headed back home yesterday.
Bus services have increased from 5,000-6,000 a day to around 9,000, he said, adding he was confident that would be enough to suit demand.
Between Thursday and tomorrow, 5,086 trips a day were being provided for passengers heading to the North and Northeast, according to the company. They can serve about 114,500 passengers a day.
On the eastern route, 1,199 daily bus trips are being laid on, which could handle more than 20,600 people. On the southern route, the company is providing 2,948 bus trips a day, which can handle about 51,600 people.
According to Transport Co, more than 72,000 people travelled on inter-provincial buses on Thursday from Bangkok's three major bus terminals -- Mo Chit, Ekamai and Boromratchonnanee.
Transport Ministry inspector-general Anon Luangboriboon said some 94,000 people caught trains to attend the cremation ceremony.
There was plenty of room as services were not overcrowded, said Mr Anon, who is also acting governor of the State Railway of Thailand.
The number of passengers heading into Bangkok for the ceremony was lower than predicted, Mr Anon said, adding that about 65,000 people laid dok mai chan, or cremation flowers, at Hua Lamphong train station on Thursday.
Meanwhile, throngs of mourners used shuttle buses to leave Sanam Luang -- site of the royal crematorium -- heading for Lan Luang intersection early yesterday, according to the Transport Ministry.
Transport Minister Arkhom Termpittayapaisith said the shuttle bus services went smoothly.
He said shuttle buses along 51 routes would remain in service until tomorrow.
Staff at Mo Chit bus terminal said the number of passengers leaving Bangkok was expected to rise today.
Elsewhere, the Marine Department said free boat services ended yesterday and all piers are operating normally.
Nat Chubchai, the department's deputy chief, said cooperation between passengers and boat operators was good with mourners following the department's instructions.
Since mourners will head to the Sanam Luang area this weekend, the department will ensure personnel are on hand to care for boat passengers until Monday, Mr Nat said. The five-day funeral ceremonies wrap up tomorrow.