Bangkok presents: New underwater tunnel for modern subway!
Learn all about Bangkok's MRT Blue Line extension, modern tunnel technology and improving mobility in the city.

Bangkok presents: New underwater tunnel for modern subway!
There is currently a lot going on in the area of urban infrastructure in Bangkok, and it is doing so with great dynamism. The construction of a new underwater tunnel between Sanam Chai and Isaraphap stations is a key element of the MRT Blue Line expansion. This impressive tunnel stretches over 1,254 meters and brings a breath of fresh air to the mobility landscape of the Thai capital. Loud Nation of Thailand The tunnel is located 30 meters below the Chao Phraya River and connects the old town with Thonburi on the opposite side of the river.
Modernity is evident not only in the construction, but also in the technology used. The tunnel will be built using modern tunnel boring machines (TBMs) and will be lined with prefabricated concrete parts to be waterproof. This project is a prime example of Thailand's urban progress and technological innovation.
The entire MRT Blue Line extension covers an impressive 28 kilometers and will significantly improve connectivity in the city. The Mass Rapid Transit Authority of Thailand (MRTA), in collaboration with other partners such as BEM and CH Karnchang, implemented an integrated rail system within 30 months. When the original line opened in July 2004, the Blue Line already carried approximately 360,000 passengers daily. Now the capacity will be increased to 500,000 passengers per day. The expansion opened for regular operations in April 2020 and includes 19 new stations ranging from Hua Lamphong in the south to Lak Song and Bang Sue in the north.
A look into the future
The new route is not only practical, but also provides a significant boost to urban development. Improving connectivity between the Thonburi side of the Chao Phraya and other parts of Bangkok will greatly reduce travel time. An automated train control system also ensures greater safety and punctuality, while new, modern trains, including carriage bodies, some of which were assembled in Vienna, ensure a pleasant ride.
In parallel with this major project, the construction of the MRT Purple Line is also progressing. Loud Thailand Construction The MRTA reported 45.38% progress in the construction of an underground tunnel that will connect Taopoon and National Library stations. The Purple Line will be operational from 2028 and is also proving to be crucial for the northwestern region of Bangkok, which will finally be connected to the subway infrastructure.
In connection with these significant expansions of the subway in Bangkok, the question arises not only about mobility, but also about the quality of life of the residents. Public transport will not only become more convenient, but could also lead to a noticeable reduction in road traffic.
Overall, the progress of the MRT projects shows that Bangkok is on the right track to getting its traffic problems under control. These developments are a clear signal that Thailand wants to be at the forefront when it comes to innovative urban solutions. Citizens can be curious to see what changes the expansion will bring before the planned final opening.