Double-decker anxiety

Researchers say standards for local-assembled double-decker buses are appallingly lax and parts from buses destroyed in accidents often end up in new buses.

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Double-decker anxiety

Sirinya Wattanasukchai

As the Songkran holidays approach, so too does the anxiety of travelling, as millions take to the roads to get to their hometowns. Many will be going by double-decker bus.

“These buses provide extra seats, and plenty of entertainment facilities, from tables to TVs and karaoke machines,” Asst Prof Thaweesak Taekratok of Naresuan University said as to why he believed that double-decker buses were so popular among tour groups and travel operators.

Despite their “luxury”, academics and those in the travel industry have recently  expressed concern over the combination of locally-manufactured double-decker buses and Thailand’s infrastructure (including the quality of roads). Prof Thaweesak added that the issue was often exacerbated by drivers who were not properly trained and who drove beyond the speed limit. Many concerned parties, including researchers from the Thailand Accident Research Centre, are therefore urging the Department of Land Transport to issue proper standards for double-decker buses, as well as barring them on dangerous routes.

“Thailand’s infrastructure wasn’t built to cater for double-decker buses and vice versa,” Prof Thaweesak insisted. Thailand’s intercity roads are too narrow, curvy and steep and most importantly, the buses, which are locally designed, are built only to serve consumers’ demands for luxury and entertainment, and not with regards to any standard of engineering safety.

Sarawut Lerspalungsanti, a researcher at MTEC (National Metal and Materials Technology Center), said that although the garage technicians might be experienced in building buses, they didn’t have much engineering knowledge.

“If any part of the bus is too short, they [garage technicians] make it longer; or any part too long, they simply cut it.” This, Sarawut explains, is unlike bus manufacturing in the West where the bus body is designed by an engineering team and produced in one piece at the factory.

Most double-decker buses in Thailand are, of course, taller than 3.6m – the height of a conventional, single-storey bus. Some are as high as 4.3m, and it is this high centre of gravity that makes them so easy to turn over.

The upper floor of a double-decker bus is often cut off from the main body after an accident, said Nuttapong Boontob, senior researcher at the Thailand Accident Research Centre. As the chassis is typically quite expensive, they are often immediately taken out of wrecks, to be used again.

Bus operators and consumers should share the blame for the high number of accidents, said Sujinda Cherdchai, owner of Cherdchai Tour that operates a bus service and produces made-to-order buses. Sujinda said that her company is currently manufacturing high numbers of double-decker buses to meet the rising market demand.

“Consumers only look for low rental rates, comfort, entertainment and luxury, but forget all about safety,” said Sujinda, who is also the president of the Thai Bus Operators Association.

Rental rates for double-decker buses and conventional buses are similar, but while the latter typically offers fewer than 40 seats, usually with only one TV, double-decker buses provide up to 50 seats and all types of entertainment.

It’s well known that most double-decker buses currently in service on Thailand’s roads were probably built from used chassis in substandard garages in Ratchaburi’s Ban Pong district. Many of the used chassis come from vehicles that have just had an accident and without having any kind of formal inspection by an engineer.

Department of Land Transport  officials conduct a balance test of a doubledecker bus at a centre in Pathum Thani. Buses higher than 3.6m have to pass a 30-degree slope test. Out of the 17,588 buses that are required to take and pass the test, the department has tested just 1,250 double-decker buses so far, and less than 60% of those (705 buses) have passed the test. APICHIT JINAKUL

Sujinda said that, unlike many other bus manufacturing companies in Thailand, her made-to-order double-decker buses were built from brand-new imported chassis from marques like Mercedes, Volvo and Scania. She did, however, refuse to reveal the exact height of her buses and said only that buses from her garage were strictly produced to meet the regulations of the Department of Land Transport. The problem lies within the low number of bus requirements in order to pass tests at the Department of Land Transport.

“If a bus is visually safe, like the doors are in their place and lockable, it’s likely to get the annual license registration renewed,” said Sawanee Chumchalieo, an officer at Foundation for Consumers.

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