Over 80,000 police officers will be assigned to boost road safety nationwide for inbound and outbound traffic during the New Year holiday break.
Deputy national police chief Pol Gen Damrongsak Kittiprapat said police will mobilise the officers to ease traffic congestion and monitor road safety during the so-called seven dangerous days.
Over 7.6 million cars are expected to leave and return to Bangkok from Dec 29 to Jan 4, up from six million last year, he said.
Outbound routes are anticipated to face the worst traffic from Dec 30-31 and inbound routes will suffer the same congestion on Jan 3.
Traffic agencies have been ordered to arrange maps of bypasses and shortcuts, and free up congested areas by Christmas Day.
Police will be posted at rest points to offer snacks and water and give recommendations on traffic routes.
The Highway Police, hotline 119, the Highway Police Facebook page, the Traffic Control and Command Centre and hotline 1197 will give route information and answer calls for help, he said.
Lorries with more than 10 wheels will be banned on some roads on Dec 30-31 and Jan 2-4 to free up traffic.
Lorry drivers who need to travel on those days can seek permission by accessing the website www.hwpdth.com.
Police will take legal action against those who violate road safety traffic laws including motorcyclists who ride on the wrong side of the road, or ride on footpaths, drivers who drink and drive, run red lights or speed.