Fai Chai Junction
road intersection in Bangkok, Thailand

Fai Chai, also written as Faichai (Thai: ไฟฉาย, RTGS: Faichai, pronounced [fāj.t͡ɕʰǎːj]), is a four-way intersection in Bangkok located in Ban Chang Lo and Bang Khun Si Subdistricts, Bangkok Noi District, Thonburi side. It is the junction of Charan Sanit Wong, Phran Nok and Phran Nok–Phutthamonthon Sai 4 Roads, can be considered as another main intersection of Thonburi side, besides Tha Phra and Borommaratchachonnani. The boundaries of the junction are considered to be where Phran Nok–Phutthamonthon Sai 4 Road ends, and where Phran Nok Road originate. It is also a location of Fai Chai MRT station.
The name is derived from the Asia-Pacific War (part of World War II) from 1941 to 1945 when Bangkok was attacked by the Allied bombers at night, especially Bangkok Noi, because it was the location of the Imperial Japanese Army base and close to many important places, such as Bangkok Noi railway station, Siriraj Hospital, Naval Dockyard Department and Royal Grand Palace in Phra Nakhon side, etc.
The Thai military units tried to establish defense measures the best way possible by installing searchlights in different places. These searchlights had to co-ordinate in looking for the aircraft of the Allied. When the targets were spotted, they would be gunned down by the anti-aircraft artillery. The artillery of such power must have a caliber of seventy-five millimeters in diameter. Hence, the area where once the searchlights were installed has been known as "Fai Chai" (literally means searchlight) since then.
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This entry incorporates text from “Fai Chai Junction” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.