Bangkok Expressway and Metro Public Company LimitedBEM, as concessionaire of the Si Rat–Outer Ring Expressway, will collect higher tolls (e.g. 65→80 baht for four-wheelers) from 15 Dec 2026.

The Expressway Authority of Thailand, under the Ministry of Transport, has announced that it will adjust the toll rates on the Prachim Ratthaya Expressway, also known as the Si Rat–Outer Ring Road Expressway in Bangkok, effective from 15 December 2026 onward. This adjustment applies only to this particular Prachim Ratthaya Expressway route. The rate change follows the conditions of the investment concession contract, which stipulates that toll rates be adjusted every five years, with Bangkok Expressway and Metro Public Company Limited, or BEM, as the concessionaire and the sole investor in the entire project. Under the new rates, four-wheel vehicles will pay 80 baht per vehicle, up from 65 baht; six- to ten-wheel vehicles will pay 130 baht per vehicle, up from 105 baht; and vehicles with more than ten wheels will pay 185 baht per vehicle, up from 150 baht. The Expressway Authority of Thailand is currently discussing the details with BEM and relevant agencies to finalize measures to ease the burden and reduce the impact on the public's expenses, and will announce the official details in advance before the toll increase takes effect.
Bangkok Expressway and Metro Public Company LimitedBEM, as concessionaire of the Si Rat–Outer Ring Expressway, will collect higher tolls (e.g. 65→80 baht for four-wheelers) from 15 Dec 2026.