Chaloem Maha Nakhon Expressway

Chaloem Maha Nakhon Expressway ทางพิเศษเฉลิมมหานคร
First Stage Expressway System ระบบทางด่วนขั้นที่ 1
Route information
Maintained by Expressway Authority of Thailand
Length	27.1 km (16.8 mi)
Existed	29 October 1981–present
Din Daeng–Tha Ruea
Length	8.9 km (5.5 mi)
North end	Vibhavadi Rangsit Road / Don Mueang Tollway
Major intersections	Si Rat Expressway
South end	Tha Ruea Junction
Tha Ruea–Bang Na
Length	7.9 km (4.9 mi)
West end	Tha Ruea Junction
Major intersections	Chalong Rat Expressway
East end	Debaratna Road
Tha Ruea–Dao Khanong
Length	10.3 km (6.4 mi)
East end	Tha Ruea Junction
Major intersections	Si Rat Expressway
West end	Rama II Road
Location
Country	Thailand
Highway system
Highways in Thailand Motorways Asian Highways

The Chaloem Maha Nakhon Expressway (Thai: ทางพิเศษเฉลิมมหานคร), also known as the First Stage Expressway System (Thai: ระบบทางด่วนขั้นที่ 1), is an expressway in Thailand, located in Bangkok. It is the first expressway to be opened in the country and is 27.1 kilometres in length. The expressway has played an important role in alleviating ground-level road traffic in Bangkok. The expressway is a controlled-access toll road.^[1]

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