On Nut Road branches off from Sukhumvit Road at On Nut Junction, about north of
On Nut BTS Station in the area of
Phra Khanong Nuea Subdistrict,
Watthana District. From there, it runs parallel to
Khlong Phra Khanong and
Khlong Prawet Burirom to the northeast, crossing Khlong Bang Nang Chin into
On Nut Subdistrict,
Suan Luang District. Upon reaching Soi On Nut 7 (Wat Mahabut), it bends to the southeast, before continuing to the east and northeast. It intersects with
Srinagarindra Road (Highway 3344) at Suan Luang (Si Nut) Junction and continues in the same direction, crossing Khlong Nong Bon into
Prawet District. This section also serves as the administrative demarcation line between the subdistricts of
Nong Bon and
Dokmai. The road continues running northeast and intersects Phatthanakan Road at the On Nut-Phatthanakan Interchange, then cuts eastward across Chaloem Phra Kiat Ratchakan Thi 9 Road at Prawet Intersection and intersects with
Kanchanaphisek Road, the outer
ring road of Bangkok, at On Nut Intersection. Finally, it cuts across Sukhaphiban 2 Road at Sirindhorn Hospital Junction before terminating at Soi On Nut 90 (Sirindhorn Hospital) at a
tripoint between the Prawet and Dokmai Subdistricts of Prawet District and
Lat Krabang Subdistrict in
Lat Krabang District. Past this point, it becomes Lat Krabang Road, which runs continuously with it. Total distance is about . Saphan San Samran (สะพานแสนสำราญ, , "joyfully bridge") is a bridge over Khlong Phra Khanong in Soi On Nut 1/1 (Habito Road). Due to the beautiful scenery with high-rise condominium complexes as a backdrop, it became a popular photo check-in point for teenagers. ==See also==