| Country: | THA |
| Alternate Name: | Second Stage Expressway System ระบบทางด่วนขั้นที่ 2 |
| Maint: | Bangkok Expressway and Metro |
| Length Km: | 38.4 |
| Si Rat Expressway ทางพิเศษศรีรัช | |
| Direction A1: | North |
| Direction B1: | East |
| Terminus A1: | Prachachuen Interchange |
| Junctions1: | Chaloem Maha Nakhon Expressway, Prachim Ratthaya Expressway |
| Section1: | A (Pracha Chuen-Phra Ram 9) |
| Established: | 2 September 1993 |
| Terminus B1: | Asok-Din Daeng Interchange |
| Section2: | B (Phaya Thai-Bang Khlo) |
| Length Km1: | 12.4 |
| Length Km2: | 9.4 |
| Direction A2: | North |
| Direction B2: | South |
| Terminus A2: | Phaya Thai Junction |
| Terminus B2: | Chaloem Maha Nakhon Expressway |
| Section3: | C (Phra Ram 9-Srinagarindra) |
| Length Km3: | 8.0 |
| Direction A3: | East |
| Direction B3: | West |
| Terminus A3: | Asok-Din Daeng Interchange |
| Terminus B3: | Motorway 7 |
| Junctions3: | Si Rat Expressway, Chalong Rat Expressway |
| Section4: | D (Pracha Chuen-Chaeng Watthana) |
| Length Km4: | 8.6 |
| Direction A4: | North |
| Direction B4: | South |
| Terminus A4: | Udon Ratthaya Expressway, Chaeng Watthana Road |
| Terminus B4: | Prachachuen Interchange |
| Junctions4: | Ngam Wong Wan Road |
The Si Rat Expressway, also known as the Second Stage Expressway System, 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.[3]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.
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.
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]
| 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) | ||||||||