It begins at Saphan Daeng intersection in the area of Thanon Nakhon Chai Si sub-district.
It runs past the northern railway line (between Sam Sen and Bang Sue stations) at Thoet Damri intersection, where it cuts Thoet Damri and Kamphaeng Phet 5 roads.
It crosses Khlong Prapa (water supply canal) and cuts Rama VI road beneath the expressway.
It was originally called "Patiphat Phuban Road" (ถนนปฏิพัทธ์ภูบาล) after the nobleman Phraya Patiphat Phuban (Khoyule na Ranong), nephew of Phraya Ratsadanupradit Mahitsaraphakdi, who used to have land that the road ran through.
[3] On June 24, 1932 at 5:00 am, Phraya Songsuradej met with his conspirators at the intersection with the northern railway line (present-day Thoet Damri intersection) to finalize the revolutionary plan (Siamese revolution of 1932).