Fuel reformulation
The fuel reformulation is separated into two types, gasoline and diesel.
Control of vehicle emissions
Controls of CO and NOX from gasoline vehicles are performed through the use of catalytic converters. All cars having engine sized greater than 1600 cc can installed catalytic converters.
Emission standard
Emission standard for new vehicles in Thailand had been established since 1995, as shown in Table 5. The main part of vehicle emission standards, excepted motorcycle, is adopted from the European Union standard.