Si Rat Expressway ทางพิเศษศรีรัช
Second Stage Expressway System ระบบทางด่วนขั้นที่ 2
Route information
Maintained by Bangkok Expressway and Metro
Length	38.4 km (23.9 mi)
Existed	2 September 1993–present
A (Pracha Chuen-Phra Ram 9)
Length	12.4 km (7.7 mi)
North end	Prachachuen Interchange
Major intersections	Chaloem Maha Nakhon Expressway, Prachim Ratthaya Expressway
East end	Asok-Din Daeng Interchange
B (Phaya Thai-Bang Khlo)
Length	9.4 km (5.8 mi)
North end	Phaya Thai Junction
South end	Chaloem Maha Nakhon Expressway
C (Phra Ram 9-Srinagarindra)
Length	8.0 km (5.0 mi)
East end	Asok-Din Daeng Interchange
Major intersections	Si Rat Expressway, Chalong Rat Expressway
West end	Motorway 7
D (Pracha Chuen-Chaeng Watthana)
Length	8.6 km (5.3 mi)
North end	Udon Ratthaya Expressway, Chaeng Watthana Road
Major intersections	Ngam Wong Wan Road
South end	Prachachuen Interchange
Location
Country	Thailand
Highway system
Highways in Thailand Motorways Asian Highways

The Si Rat Expressway (Thai: ทางพิเศษศรีรัช), also known as the Second Stage Expressway System (Thai: ระบบทางด่วนขั้นที่ 2), is an expressway in Thailand, located in Bangkok and Nonthaburi province. It is the second expressway to be opened in the country and is 38.4 kilometres in length. The expressway has played an important role in alleviating ground-level road traffic in Bangkok. It is a controlled-access toll road.^[1]

Due to a significant increase in road traffic in the Bangkok Metropolitan Region, and after the Chaloem Maha Nakhon Expressway was opened, a second expressway was proposed in order to alleviate the increased traffic. The Expressway Authority of Thailand (EXAT) assigned Bangkok Expressway and Metro (BEM) to construct this expressway and a contract was signed on 22 December 1988.

The contract was so corrupted that lead to the court order.^[2]

Sukavich Rangsitpolsaid that the authority had sought the intervention of the court following reports that motorists, resentful at being stuck in jams for hours while the completed expressway was unused, might resort to violence unless it was immediately opened. He said that Bangkok Expressway had no reason to continue to block the highway opening because the government last month reversed an earlier decision and reinstated the toll of 30 baht ($1.20) that had originally been agreed to.

^[3]

Expressway construction was opened in four stages, named A to D. Section A between Pracha Chuen–Phaya Thai–Phra Ram 9 was opened on 2 September 1993 along with Section C between Phra Ram 9–Srinagarindra which opened on the same day. Section B between Phaya Thai–Bang Khlo opened on 6 October 1996. Section D between Pracha Chuen–Chaeng Watthana opened on 1 April 2000.^[1]

According to an official EXAT annual report, the expressway was used by 200,645,817 cars in the 2022 fiscal year, with an average of 579,901 cars per day.^[4]

This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can. (April 2023)

Si Rat Expressway Bang Khlo – Chaeng Watthana (Sections A, B and D)
Location	km	Northbound		Facility		Southbound		Section
		Exit destinations (road)	Toll Plaza (Entry)	English	Thai	Toll Plaza (Entry)	Exit destinations (road)
Bangkok	0.00	Eastbound - Bangkok Port, Din Daeng, Bang Na ( Chaloem Maha Nakhon Expressway)	Sathu Pradit 2	Bang Khlo Junction	ต่างระดับบางโคล่	-	Westbound - Dao Khanong ( Chaloem Maha Nakhon Expressway)	B
			Phra Ram 3
	2.02	Trok Chan Intersection (Chan Road)	Chan	Chan Interchange	แยกทางด่วนถนนจันทน์	-	Sathu Pradit Intersection (Chan Road)
	3.25	Sathon Road, Taksin Bridge (Sathon Road)	-	Sathon Interchange	แยกทางด่วนถนนสาทร	Sathon	-
	3.70	-	-	Si Lom Interchange	แยกทางด่วนถนนสีลม	-	Surasak Intersection (Si Lom Road)
	4.00	-	Surawong	Surawong Interchange	แยกทางด่วนถนนสุรวงศ์	-	-
	5.30	Hua Lamphong (Rama IV Road)	Hua Lamphong	Mahanakhon Interchange	แยกทางด่วนมหานคร	Saphan Sawang	Sam Yan (Rama IV Road)
	7.10	Urupong, Yommarat, Lan Luang Road, Phitsanulok Road (Phetchaburi Road)	Yommarat	Urupong Interchange	แยกทางด่วนอุรุพงษ์	Urupong	Ratchathewi (Phetchaburi Road)
	9.50	Eastbound - Phra Ram 9, Srinagarindra Road ( Si Rat Expressway)	-	Phaya Thai Junction	ต่างระดับพญาไท	-	-	A,B
	10.50	Khlong Prapa, Pradiphat (Rama VI Road)	Khlong Prapa 1	Khlong Prapa Interchange	แยกทางด่วนคลองประปา	Khlong Prapa 2	Sam Sen, Ministry of Finance (Rama VI Road)	A
	12.50	Chatuchak Park, Chatuchak Market, Bang Sue ( Kamphaeng Phet Road)	-	Kamphaeng Phet Interchange	แยกทางด่วนถนนกำแพงเพชร	Yan Phahon Yothin	-
	13.90	Chatuchak Park, Bangkok Bus Terminal, Krung Thep Aphiwat Central Terminal (Kamphaeng Phet 2 Road)	-	Kamphaeng Phet 2 Interchange	แยกทางด่วนถนนกำแพงเพชร 2	Bang Sue	Chatuchak Park, Bangkok Bus Terminal, Krung Thep Aphiwat Central Terminal (Kamphaeng Phet 2 Road)
	15.40	-	Bang Sue 1 (to Prachim Ratthaya)	Si Rat Junction	ต่างระดับศรีรัช	Bang Sue 2 (from Prachim Ratthaya)	Westbound - Taling Chan, Outer Ring Road (West) ( Prachim Ratthaya Expressway)
	16.80	Prachanukun Intersection, Wong Sawang (Ratchadaphisek Road)	-	Ratchadaphisek Interchange	แยกทางด่วนถนนรัชดาภิเษก	Ratchadaphisek	Vibhavadi Rangsit Road (Ratchadaphisek Road) - exit at Prachachuen Interchange
	18.10	-	Pracha Chuen (Outbound)	Pracha Chuen Interchange	แยกทางด่วนประชาชื่น	Pracha Chuen (Inbound)	Pracha Chuen (Pracha Chuen Road)	A,D
		Pracha Chuen 2 Toll Plaza			Pracha Chuen 1 Toll Plaza
Nonthaburi	20.12	Nonthaburi, Khae Rai ( Ngam Wong Wan Road)	Ngam Wong Wan 1	Ngam Wong Wan Interchange	แยกทางด่วนถนนงามวงศ์งาน	Ngam Wong Wan 2	Bang Khen, Kasetsart University ( Ngam Wong Wan Road)	D
	24.25	Lak Si, Pak Kret ( Chaeng Watthana Road)	-	Chaeng Watthana Interchange	แยกทางด่วนถนนแจ้งวัฒนะ	Chaeng Watthana	-
		Chiang Rak, Bang Pa-in ( Udon Ratthaya Expressway)	-
Phaya Thai – Srinagarindra (Sections A and C)
Location	km	Eastbound		Facility		Westbound
		Exit destinations (road)	Toll Plaza (Entry)	English	Thai	Toll Plaza (Entry)	Exit destinations (road)
Bangkok	0.00	Northbound - Ratchadaphisek, Chaeng Watthana ( Si Rat Expressway)	-	Phaya Thai Junction	ต่างระดับพญาไท	-	Southbound - Silom, Bang Khlo ( Si Rat Expressway)	A,B
	1.27	Sanam Pao (Phahon Yothin Road)	Phahon Yothin 1	Victory Monument Interchange	แยกทางด่วนอนุสาวรีย์ชัยสมรภูมิ	Phahon Yothin 2	Victory Monument (Phahon Yothin Road)	A
	2.27	Northbound - Din Daeng ( Chaloem Maha Nakhon Expressway)	-	Makkasan Junction	ต่างระดับมักกะสัน	-	Southbound - Dao Khanong, Bang Na ( Chaloem Maha Nakhon Expressway)
	4.45	Phra Ram 9 Intersection (Ratchadaphisek Road)	-	Asok-Din Daeng Interchange	แยกทางด่วนถนนอโศก-ดินแดง	Asok 2	-	A,C
	4.70	Asok 3 Toll Plaza			Asok 4 Toll Plaza
	5.00	Rama IX Road (Phet Uthai Road)	Asok 3-1	Phet Uthai Interchange	แยกทางด่วนถนนเพชรอุทัย	Asok 1	-	C
	6.80		Phra Ram 9	Phra Ram 9 Interchange	แยกทางด่วนถนนพระราม 9	-	Rama IX Road (Rama IX Road)
	7.75	Northbound - Lat Phrao, Ram Inthra ( Chalong Rat Expressway)	Phra Ram 9-1 (to Chalong Rat)	Ramkhamhaeng Junction	ต่างระดับรามคำแหง	Phra Ram 9-1 (from Chalong Rat)	Southbound - Phatthanakan, At Narong ( Chalong Rat Expressway)
						Ramkhamhaeng
	13.03	Bang Kapi, Bang Na (Srinagarindra Road)	-	Srinagarindra Junction	ต่างระดับศรีนครินทร์	Srinagarindra	-
		Lat Krabang, Suvarnabhumi Airport, Chonburi (Motorway 7)

• Controlled-access highways in Thailand
• Expressway Authority of Thailand