The expressway has played an important role in alleviating ground-level road traffic in Bangkok.

[1] Rama IX Bridge, is part of the Tha Ruea–Dao Khanong expressway section.

Due to a significant increase in road traffic in the Bangkok Metropolitan Region, an expressway system was proposed in order to alleviate the heavy ground-level road traffic and in preparation for the predicted increase in car usage.

Its northern end terminated at Vibhavadi Rangsit Road in Din Daeng district and its southern end terminated at Tha Ruea (Port) Junction near Bangkok Port in Khlong Toei district.

[3] Due to increased road traffic on the expressway, Rama IX Bridge was expanded in 2020 and is expected to be completed in 2023.