Rama III Road starts from the foot of
Krungthep Bridge in
Thanon Tok quarter where it intersects with
Mahai Sawan and the last section of
Charoen Krung Roads in the area of
Bang Kho Laem District. It then runs eastward up till Nang Linchi Junction, where it crosses Nang Linchi Road in front of Wat Chong Lom temple, and then northeastward across Chuea Phloeng Road and
Eastern Railway Line (Mae Nam Branch) from nearby
Mae Nam Railway Station on the periphery of
Yannawa and
Khlong Toei Districts, and then enters Khlong Toei area. It ends at Na Ranong Square, the five-way intersection of Sunthonkosa,
Ratchadaphisek and Na Ranong Roads near
Khlong Toei Market and
PAT Stadium. The
bus rapid transit,
Bangkok BRT (Sathon–Ratchaphruek route) operates with six stations (Rama III Bridge, Charoenrat, Rama IX Bridge, Wat Dokmai, Wat Pariwat, Wat Dan) on this road. Rama III is a road that connects to many main roads, including Ratchadaphisek, Sathu Pradit,
Rama IV,
Sathon,
Chan,
Naradhiwas Rajanagarindra Roads, as well as
Bhumibol Bridge (Mega Bridge), etc.
Rama III Bridge (widely known as Krungthep II Bridge or New Krungthep Bridge) carries the road as well. ==History==