The road starts at the corner of Ruan Cham junction from Maha Chai road in front of Special Bangkok Metropolitan Prison (present-day Bangkok Corrections Museum), and southeastward to Krung Kasem road in the area catty-corner from Bangkok railway station, also commonly known as Hua Lamphong railway station.
[3] Another one—King Chulalongkorn had Nopphawong bridge built side by side with the road and he wanted it to be finished in time for his birthday celebration in December 1897, when the king would be the same age as his half-older brother Prince Nopphawong.
[4][2] It across Khlong Phadung Krung Kasem at the area where Prap Sattru Phai Fort used to be located.
The direction of traffic is from Nopphawong intersection, the five-way intersection, where it cuts across Krung Kasem and Mittraphan roads, at the foot of Nopphawong bridge on the northwest side up till reaching Ruan Cham junction.
It passes by important places (apart from Wat Debsirin) include Phlapphla Chai intersection and Klang Hospital.