Pathum Wan District
Sukhumvit Road begins in Bangkok, as a continuation of Rama I Road and Phloen Chit roads which span Pathum Wan District. Starting from where the boundaries of the districts of Khlong Toei, Pathum Wan and Watthana meet, it runs the entire length of the border between Khlong Toei and Watthana, then passes through Phra Khanong and Bang Na districts.