BUDGET constraints may have contributed to the deaths of four teachers and two students who were killed yesterday when a double-decker bus on a school trip plunged into a ravine in Prachin Buri’s Na Di district.

The accident took place on the Highway 304 on the route from Nakhon Ratchasima to Na Di. The two-lane road, which is known to be dangerous, is very steep and curvy for more than 12 kilometres.

An initial investigation of the scene revealed that a burning smell had spread in the bus just before it went out of control, hit another car, several electricity poles and a road barrier, before plunging about 20 metres into the ravine with more than 50 students and teachers on board.

Nikorn Chamnong, the president of the Thai Safety Association, said in a statement: “The Education Ministry and relevant authorities should urgently investigate the latest accident. Also, they must take measures to prevent such problems from recurring.

“Last year, so many road accidents occurred during educational trips, killing 195 victims,” Nikorn said.

The National Reform Steering Assembly’s ad-hoc committee on road safety previously proposed an improved road safety plan to the government, a safety association report stated.

“It should be noted that each academic semester, the budget for students’ educational trip is only Bt291 per head,” the report said.

Budget constraints have made it difficult for schools to get quality bus services and in some cases buses have lacked proper insurance and drivers were not be familiar with routes.

Double-decker buses were chosen to save money because they can take many more passengers with a single driver.

Grieving mother Patcharaporn Janpitak, 38, of Khon Kaen province, sobbed when she learned that her only son died in yesterday’s accident.

Her son, Kittipong Wongwai, was among the students on the educational trip to Chantha Buri’s Kung Krabaen. The bus left their home province of Khon Kaen at 9pm on Wednesday night.

“He spoke strangely before he left. He said something like he would not be able to come back and asked his younger sister to take good care of me,” Patcharaporn said.

Nam Phong district chief Supachai Leekhaosoong visited her to offer moral support.

Meanwhile, Na Di district chief Noppadon Ngam-lua visited injured victims at Na Di Hospital. As of press time, three remained hospitalised.