At dusk, a woman rests her eyes during an evening commute home after a day at work in central Bangkok in May 2026. She is one of tens of thousands of passengers who each day ride a boat service that operates along the Saen Saep concrete-lined canal, originally constructed on the order of King Rama III in 1837Srinakharinwirot University – A Study on the Water Quality of the Saen Saeb Canal: A Case Study on the SWU Joint Conservation of the Saen Saeb Canal Project, 2018 to transport soldiers and weapons. The water transport system has been serving urban commuters since 1990Bangkok Post – Waterworld, 2016. Boats get crowded during rush hour, carrying up to 120Bangkok Post – Famous Bangkok boat service to limit passengers, 2020 passengers between the heart of the Thai capital and the eastern outskirts of Bang Kapi, for fares ranging from 15 to 25The Nation – Chao Phraya, Saen Saep boat fares to rise again on April 7, 2026 baht ($0.5–0.75).

The Saen Saep commuter route, along with a similar service running on the Chao Praya River since 1971Chao Phraya Express Boat – About us, is one of the last operational examples of canal-based transport that dominated mobility in Bangkok before the expansion of road-based infrastructure. The Southeast Asian city is criss-crossed by 1,161Bangkok Post – Waterworld, 2016 canals, known in Thai as khlongs, forming a network of waterways that spans nearly 2,300 kilometres and penetrates deep into most neighbourhoods. Before serving as transport corridors, the canals’ primary function is to drain rainwaterRajaratnam School of International Studies – Reflections on the Waters, 2011 during the annual May-OctoberInternational Civil Aviation Organisation – Climatological Information for Bangkok rainy season. Bangkok was builtThe Siam Society – Historical Geography of the canal system in the Chao Phraya river delta on a swampy floodplain located at the receiving end of rainwaters flowingFood and Agriculture Organisation – Thailand from the northern provinces to the Gulf of Thailand.

In the mid-2020s, the Saen Saep service ferried about 11Thailand Marine Department – รายงานการสำรวจความหนาแน่นผู้โดยสาร, 2026 million passengers annually, down by 40 to 50% from ridership levels seen in the late 2010s. The operator attributedBangkok Post – Saen Saep boat fares rising by one baht this week, 2026 the decline to the adoption of work from home, and the rise of the metro as an alternative. The launch of the Mass Rapid Transit Orange Line, expected to be fully operational in 2030Mass Rapid Transit Authority of Thailand – The MRT Orange Line, 2026, will run parallel to mostBangkok Transit Map of the Saen Saep route with a capacity of 50,000 passengers per hour in each direction, rendering sections of the boat service redundant. Still, public transport, including buses and the railway, remain peripheral to Bangkok’s mobility system, accounting for only one in ten of the more than nine billionThailand Office of Transport and Traffic Policy and Planning – Bangkok travel demand survey, 2023 trips recorded in the city in 2023 as residents shifted to private vehicles.

Alternative mobility options have gained traction as canal commuters endure persistent daily exposure to heavily polluted water, including diesel exhausts of the fossil fuel-poweredBangkok Post – Nationwide ban on gas passenger boats, 2016 boats they ride on. A Thai government environmental agency identified 720Bangkok Post – Saen Saep water quality on the rise, 2019 pollution discharge points along the canal in 2019, with an estimated 800,000Bangkok Post – Klong rehab project to cost B82.5bn, 2021 cubic metres of wastewater still being dumped into the canal daily over the following year. Yet, officials continue to view canals as mobility corridors amid road congestionTomTom – Bangkok, 2026. Alongside efforts in recent years to introduce electric-powered water taxisBangkok Post – Bangkok taxi boats to Bang Lamphu on free trial, 2026 and boatsBangkok Post – Electric boat service gets fresh start, 2023 to eliminate diesel exhausts, work is under way to rehabilitateThe Nation – Bangkok Revitalises Arterial Canals to Create Seamless ‘Smart City’ Transport Links, 2026 pedestrian pathways along the Saen Saep canal. The project aims to encourage walking and cycling, the leastIntergovernmental Panel on Climate Change – Chapter 10: Transport, 2023 polluting forms of mobility, as alternatives to motorised transport.