Purple Line (Bangkok)

MRT Purple Line
J-TREC sustina trainset
Overview
Other name(s)	MRT Chalong Ratchadham Line
Native name	สายสีม่วง สายฉลองรัชธรรม
Owner	Mass Rapid Transit Authority
Locale	Nonthaburi Province and Bangkok
Termini	PP01  Khlong Bang Phai  PP16  Tao Poon
Stations	Total : 33 stations 16 (operational) 17 (under construction)
Color on map	Purple
Service
Type	Rapid transit
System	MRT
Operator(s)	Bangkok Expressway and Metro
Depot(s)	Khlong Bang Phai Kru Nai (under construction)
Rolling stock	J-TREC Sustina S24-EMU : 21 three-car trainsets
Daily ridership	70,303 (๋July 2024)
History
Commenced	10 November 2009; 15 years ago (2009-11-10)
Opened	6 August 2016; 8 years ago (2016-08-06)
Technical
Line length	Total :43.70 km (27.15 mi) 20.92 km (13.00 mi) (operational) 22.78 km (14.15 mi) (under construction)
Number of tracks	2
Character	Elevated: 30.63 km (19.03 mi) Underground : 13.07 km (8.12 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC third rail
Operating speed	80 km/h (50 mph)
Signalling	Bombardier CITYFLO 650 moving block CBTC ATC under ATO GoA 2 (STO), with subsystems of ATP, ATS and CBI[1]
Route map PP1 Khlong Bang Phai To Main Depot PP2 Talad Bang Yai PP3 Sam Yaek Bang Yai PP4 Bang Phlu PP5 Bang Rak Yai PP6 Bang Rak Noi Tha It PP7 Sai Ma Chao Phraya River PP8 Phra Nang Klao Bridge PP9 Yaek Nonthaburi 1 PP10 Bang Krasor  MRT  Pink Line: Min Buri PP11 Nonthaburi Civic Center PP12 Ministry of Public Health PP13 Yaek Tiwanon PP14 Wong Sawang  SRT  Light Red Line: Taling Chan – Bang Sue PP15 Bang Son PP16 Tao Poon  MRT  Blue Line: Tha Phra – Bang Sue Parliament House Sri Yan Vajira Hospital National Library Bang Khun Phrom Democracy Monument  MRT  Orange Line: Taling Chan – Min Buri Sam Yot  MRT  Blue Line: Bang Khae – Hua Lamphong Chao Phraya River Memorial Bridge  SRT  Dark Red Line: Maha Chai – Hua Lamphong Wongwian Yai  BTS  Silom Line: Bang Wa – Siam Somdech Phra Pinklao Hospital Dao Khanong Bang Pakaeo Bang Pakok Yaek Pracha Uthit Rat Burana Phra Pradaeng Khru Nai

The MRT Purple line (Thai: รถไฟฟ้ามหานคร สายสีม่วง) or MRT Chalong Ratchadham line (Thai: รถไฟฟ้ามหานคร สายฉลองรัชธรรม) is Bangkok's fifth rapid transit line, following the Sukhumvit Line, Silom Line, MRT Blue Line, and Airport Rail Link. The line is 23 km (14 mi) long,^[2] serving the north-western area of Bangkok running from Tao Poon to Klong Bang Phai in Nonthaburi Province.

The line opened on 6 August 2016.^[3][2] It is the second line of MRT system and is operated by BEM under a concession contract. Daily ridership is 70,000.^[4][5]

A 23.63 km (14.68 mi), 17 station southern extension of the line consisting of a 14.3 km (8.89 mi) underground section and a 9.3 km (5.78 mi) elevated section ^[6] commenced construction in August 2022. The cost of the southern extension is 82 billion baht and it is planned to open at the end of 2027.^[7] By the end of May 2023, construction had progressed to 11.50%.^[8]

Route alignment

The MRT Purple Line platform at Khlong Bang Phai MRT station

MRT Purple Line route map at Tao Poon Station (14 August 2016)

Ticket Vending machines at Khlong Bang Phai MRT station

Entrance to Tao Poon station, MRT Purple Line

Khlong Bang Phai MRT station

The Purple line starts from Khlong Bang Phai station in Bang Bua Thong District. The line travels south along Kanchanaphisek Road before turning eastward near Central WestGate, onto Rattanathibet Road. It continues along Rattanathibet Road, passing through a large residential area in Bang Yai District and crosses the Chao Phraya River on a bridge parallel to the Phra Nang Klao Bridge and runs towards Nonthaburi Civic Center station. The line then turns southward onto Tiwanon Road, passing the Ministry of Public Health and turns southeast onto Krung Thep-Nonthaburi Road, entering Yaek Tiwanon station. The line then enters Bangkok city limits at Bang Sue district and passes Bang Son station before terminating at the upper platforms of Tao Poon station, with a total length of 23 kilometres (14.29 mi), serving 16 stations.

History

Officially named the Chalong Ratchadham Line (Thai: สายฉลองรัชธรรม) – "To Celebrate the Great King's Reign with Righteousness"^[9] – but informally known as the "Purple Line", the rapid transit line provides a north–western corridor in Bangkok's Mass Rapid Transit Master Plan. The line also incorporated an extension of the Blue Line from nearby Bang Sue station to Tao Poon Station.

In the 1990s, the plan for the Purple Line was to run from Bang Phut to Bang Sue for 12 kilometres (7.5 mi), with an extension to Thewet for 6.7 kilometers (4.2 mi).^[10]

This line was created from the adjustment of the 1994 mass transit rail system master plan, which connected the original extension of the Blue Line from Tao Poon to Bang Yai, while the original Purple Line would have run from the National Library to Tao Poon and the original Orange Line from Samsen (National Library) to Rat Burana, becoming a new line designated as the Purple Line, included in the master plan of the Office of Transport and Traffic Policy and Planning (OTP) for the first time in 2004. Five years later, the line's construction began.

Northern section

Construction was divided into six contracts, three of them for civil works. The contracts were signed from late 2009 to early 2010 and completion was originally scheduled for the end of 2014.^{[11][12][13][14]} The third contract included construction of four park and ride buildings at the Khlong Bang Phai, Sam Yaek Bang Yai, Bang Rak Noi Tha It, and Yaek Nonthaburi 1 stations. On 31 March 2017, the fifth contract was effectively terminated and became part of a new Blue Line concession agreement.^[15][16]

The 2011 Thailand floods delayed the construction of the line for nearly 1 year. In June 2013, five people were injured when six beams fell onto vehicles below Tao Poon station.^[17] In July 2014, the civil work was 94 percent complete;^[18][19] in October 2014, civil work was stated to be 99% complete.^[20]

The line opened on August 6, 2016, when His Majesty King Bhumibol Adulyadej graciously appointed Her Royal Highness Princess Maha Chakri Sirindhorn to represent him in presiding over the opening ceremony and officially pressing the button to open the electric train system.^[3][21] However, the MRT Blue Line extension to Tao poon was delayed, so when it opened the Purple Line couldn't interchange with the Blue line as planned. This resulted in low line usage. Even with a reduced fare, the line only attracted about 22,000 passengers daily compared to a goal of 100,000. A shuttle bus service was in operation between Tao Poon MRT station and Bang Sue MRT station to connect with the Blue Line.^[22] When the Blue line extension finally opened a year later, on 11 August 2017,^[23][24] ridership significantly increased. In 2019, daily ridership was 70,000.^[4][5]

Construction contracts

Contract	Notes	Contractor(s)	Length (km)
1	Phra Nang Klao Bridge to Tao Poon	CKTC Joint Venture[11]	13
2	Khlong Bang Phai to Phra Nang Klao Bridge	Sino-Thai Engineering & Construction[12]	10.75
3	Khlong Bang Phai Depot and Park & Ride buildings	PAR Joint Venture[13]
4	Purple Line Rolling stocks and O&M	Bangkok Expressway and Metro[25][26][27][28][29]
5	Bang Sue to Tao Poon section and O&M (MRT Blue Line)
6	Track and Electrical	Italian-Thai Development[30][31]

Southern section

As the northern section of the Purple line was built first, the 2nd phase of the Purple Line south from Tao Poon via Rattanakosin - Bangkok's old town to Rat Burana would fully complete the line. The length of the southern extension is 23.63 km (14.68 mi) (14.29 km (8.88 mi) underground, 9.34 km (5.80 mi) elevated with 17 stations - ten underground and seven elevated).^[6]

The Thai Cabinet was expected to approve the tender in mid 2017 with a tender then to be issued in the second half of 2017.^[32] On 25 July 2017, Cabinet approval was given,^[33][34] but the tender was then delayed until 2018.^[35][36] By December 2018, a tender had still not been issued and was further delayed.^[37] In August 2019, subject to final land acquisition, a March 2020 tender was planned.^[38] In mid 2020, the Ministry of Transport still aimed for a tendering process within 2020 despite COVID-19 related delays.^[39] The MRTA then expected to issue a tender in February 2021.^[40] and if construction had begun in 2021, the extension was projected to enter service sometime in 2027.^[41] However, the tender was delayed yet again and subsequently cancelled in August 2021 until it was finally issued in November 2021.^[42]

Construction contracts were signed on 11 March 2022 with a 2005 construction period for an ambitious planned 2027 opening date.^[43]

Construction progress

Contactors were issued with a Notice to Proceed on 25 April 2022 giving them access to sites along the route with actual construction planned to begin from August 2022.^[44] Construction began in early August for two contract sections, 3 & 4.^[45] Some 410 lots and 500 buildings will need to be appropriated to build the extension and as of May 2022 many of them were still to be surveyed.^[7]

Construction progress was at 3.45% complete at the end of September 2022.^[46] By the end of November 2022, construction progress was at 4.30%. ^[47] At the end of February 2023, construction had progressed to 7.73%.^[48]

By the end of May 2023, construction had progressed to 11.50%. ^[49]

Construction contracts

Contract	Notes	Contractor(s)	Length (km)	Progress (November 2024)	Cost[50]
1	Tao Poon to National Library	CKST Joint Venture	4.8	61.02%	฿19,430 million
2	National Library to Phan Fah		3.44	52.95%	฿15,878 million
3	Phan Fah to Memorial Bridge	ITD-NWR Joint Venture	3.1	41.91%	฿15,109 million
4	Memorial Bridge to Dao Khanong	Unique Construction and Engineering	4.1	45.22%	฿14,982 million
5	Dao Khanong to Kru Nai & Depot	Italian-Thai Development	9	24.11%	฿19,904 million
6	Track and Electrical			36.37%	฿3,589 million
7	Rolling stock	TBA		TBA
Total Progress				46.34%[51]	฿82,083 million

Stations

Further information: List of rapid transit stations in Bangkok

Code	Station Name		Opened	Platform Type	Position	Park & Ride	Transfer	Notes
	English	Thai
Khlong Bang Phai - Tao Poon: 20.92 km (operational)
PP01	Khlong Bang Phai	คลองบางไผ่	6 August 2016; 8 years ago (2016-08-06)	Island	Elevated	√		Exit to: • Khlong Bang Phai Depot • DHL Supply Chain & Distribution
PP02	Talad Bang Yai	ตลาดบางใหญ่		Island		-		Exit to: • Big C Extra Bangyai • The Square Bang Yai • Kasemrad International Hospital Ratthanatibeth • Home Pro Rattanathibet • Big C Supercenter Rattanathibet 1 • Decathlon Bangyai • Index Living Mall Bang Yai • Central Westgate • IKEA Bangyai • Bang Yai Market
PP03	Sam Yaek Bang Yai	สามแยกบางใหญ่		Island		√
PP04	Bang Phlu	บางพลู		Island		-		Exit to Megahome Rattanathibet
PP05	Bang Rak Yai	บางรักใหญ่		Island		-		Exit to Wat Bang Rak Yai
PP06	Bang Rak Noi Tha It	บางรักน้อย-ท่าอิฐ		Island		√	Proposed connecting station to  BTS  (future)
PP07	Sai Ma	ไทรม้า		Island		-
PP08	Phra Nang Klao Bridge	สะพานพระนั่งเกล้า		Island		-	Connecting station, without paid-area integration to Phra Nang Klao pier for •  Mine Smart Ferry  •  CHAOPHRAYA EXPRESS	Exit to: • Wat Noi Nok • Wat Chaeng Sirisamphan • Tonsak Market • Rajamangala University of Technology Suvarnabhumi - Nonthaburi Campus - North Area
PP09	Yaek Nonthaburi 1	แยกนนทบุรี 1		Island		√		Exit to: • Central Rattanathibet • Owl Market
PP10	Bang Krasor	บางกระสอ		Island		-		Exit to: • Big C Supercenter Rattanathibet 2 • Grand Richmond Stylish Convention Hotel Formerly Si Phon Sawan
PP11	Nonthaburi Civic Center	ศูนย์ราชการนนทบุรี		Island		-	Connecting station, without paid-area integration, to •  MRT  , via a 350-metre elevated pedestrian walkway. •  MRT  (future)	Exit to: • National Broadcasting and Telecommunications Commission • Nonthaburi Civic Center • Esplanade Cineplex Ngamwongwan – Khae Rai • Siam Business Administration Nonthaburi Technological College • Makut Rommayasaran Park
PP12	Ministry of Public Health	กระทรวงสาธารณสุข		Island		-		Exit to: • Ministry of Public Health • Srithanya Hospital • Regional Revenue Office 4
PP13	Yaek Tiwanon	แยกติวานนท์		Island		-
PP14	Wong Sawang	วงศ์สว่าง		Island		-		Exit to Big C Market Place Wong Sawang
PP15	Bang Son	บางซ่อน		Island		-	Connecting station, without paid-area integration, to •  SRT  • SRT Southern Line	Exit to Bang Son Market
PP16	Tao Poon	เตาปูน		Island		-	Interchange station to  MRT	Exit to: • Tao Poon Market • Lotus's Prachachuen
Tao Poon - Kru Nai: 22.78 km (under construction)
PP17	Parliament House	รัฐสภา	2027; 3 years' time (2027) (expected)	Island	Underground	-		Exit to: • Thai Parliament • Defence Industrial Department • 4th Armoured Regiment, 1st Division King's Royal Guard • Air Defence Division • Wat Mai Thongsen • Wat Kaew Fah Chulamanee
PP18	Sri Yan	ศรีย่าน		Stacked		-		Exit to: • Supreme Complex • Makro Samsen • Royal Irrigation Department • Medium Irrigation Water Resources Development Division • Wimol Sriyan Commercial College
PP19	Vajira Hospital	วชิรพยาบาล		Stacked		-		Exit to: • Vajira Hospital • Sukhothai Palace • Market Place Dusit • Suan Dusit University • Saint Gabriel's College
PP20	National Library	หอสมุดแห่งชาติ		Side		-		Exit to: • Suan Sunandha Rajabhat University • The National Library • Rajamangala University of Technology Phra Nakhon
PP21	Bang Khun Phrom	บางขุนพรหม		Stacked		-		Exit to: • Bank of Thailand • Bank of Thailand Museum • Bang Khun Phrom Palace • Wat Sam Phraya
PP22	Democracy Monument	อนุสาวรีย์ประชาธิปไตย		Stacked		-	Interchange station to  MRT  (under construction)	Exit to: • Mahakan fort • Rattanakosin Exhibition Hall • Queen Sirikit Gallery • Royal Pavilion Mahajetsadabadin • Wat Saket Formerly Phan Fa
PP23	Sam Yot	สามยอด		Island		-	Interchange station to  MRT	Exit to: • Khlong Ong Ang • Mega Plaza Saphan Lek • Phahurat • Rommaninat Park • The Old Siam Plaza
PP24	Memorial Bridge	สะพานพุทธฯ		Island		-	Proposed connecting station to Prachathipok station for  MRL	Exit to: • Suksanari School • Wat Prayurawongsawat Worawihan • Wat Phitchaya Yatikaram Worawihan • Wat Anongkharam Worawihan • Nan Ah Hospital • Big C Supercenter Itsaraphap
PP25	Wongwian Yai	วงเวียนใหญ่		Island		-	Connecting station, without paid-area integration to •  BTS  via 270-metre underground walkway •  SRT  via 120-metre covered walkway (future)	Exit to: • Wongwian Yai Market • Wongwian Yai
PP26	Somdech Phra Pinklao Hospital	โรงพยาบาลสมเด็จพระปิ่นเกล้า		Island		-		Exit to: • Somdech Phra Pinklao Hospital • Samre Market Formerly Samre
PP27	Dao Khanong	ดาวคะนอง		Side	Elevated	-		Exit to: • Big C Supercenter Dao Khanong • Wat Mongkhon Wararam
PP28	Bang Pakaeo	บางปะแก้ว		Side		-
PP29	Bang Pakok	บางปะกอก		Side		√		Exit to: • Wat Bang Pakok • Bang Pakok Wittayakom School • Bangpakok 1 Hospital • Bang Pakok Fresh Market • Lotus's Bangpakok
PP30	Yaek Pracha Uthit	แยกประชาอุทิศ		Side		-		Exit to: • Bangkok Employment Office Area 2 • Han Clan Foundation of Thailand • Wat Sarod School • Wat Sarod Formerly Rama 9 Bridge
PP31	Rat Burana	ราษฎร์บูรณะ		Side		√
PP32	Phra Pradaeng	พระประแดง		Side		-		Exit to: • Phra Pradaeng Arcade Market • HomePro Suk Sawat • Big C Supercenter Suksawat • Thaiwatsadu Suk Sawat
PP33	Khru Nai	ครุใน		Side		-		Exit to Wat Kru Nai

^[2]

Rolling stock

In November 2013, BEM contracted with Marubeni Corp, Toshiba Corp, and East Japan Railway Company to install E&S systems, supply 21 three-car trains (total of 63 cars) rolling stock, and provide maintenance for 10 years as part of a contract worth 12.6 billion baht.^[52] East Japan Railway train manufacturing subsidiary J-TREC built them in Yokohama with the first sets delivered in early 2016.^[53] The trains are owned by the MRTA which paid for the rolling stock at BEMs request.^[38] The southern extension will acquire 17 additional trains, along with the current ones, to create a total of 38 trains.

In total, line is service by 21 three-car trains.^[9] Trains are powered by 750 V DC via third rail system, are air-conditioned and capable of traveling at up to 80 km/h (50 mph).

• 
  MRT Purple Line train entering a station.
• 
  Purple Line train spotted near Central Westgate.
• 
  Interior of a train.
• 
  Interior of a train.
• 
  Dynamic route map
• 
  Platform Level at Bang Phlu station

Operation

Headways

MRT Purple Line headway[54]
Time	Headway (Minutes:Seconds)
Monday - Friday
05.30 - 06.30	07:12
06:30 - 08:30	04:50
08:30 - 09:30	06:25
09:30 - 17:00	08:30
17:00 - 20:00	04:50
20:00 - 21:00	06:25
21:00 - 24:00	09:30
Saturday to Sunday and Public Holiday
06:00 - 24:00	09:30

Ridership

When the Purple line first opened daily ridership was only 22,000 compared to projected numbers of 100,000.^[55] After the opening of the Blue Line extension to Tao Poon 1 year later in August 2017, daily average ridership increased significantly from 33,000 to 50,000.^[56]

In August 2018, the MRTA Deputy Governor stated that daily ridership had increased to 60,000 each weekday.^[57] By late 2019, this had increased to 70,000.^[4] In 2023 the purple line saw an average of 50385 passengers per day. ^[58]

On 16 October 2023, MRT Purple Line began using the new fare rates of 14 to 20 baht (down from 16 to 42 baht) after the '20 Baht Transit Max Fares Policy' was approved by the Thai government.^[59]

MRT Purple Line Ridership[60]
Year	Quarter	Quarterly Ridership	Daily Ridership	Annual Ridership	Remarks
2016	Q1			3,074,389
	Q2
	Q3	1,161,989	20,731		PP01  Khlong Bang Phai -  PP16  Tao Poon section opened on 6 August 2016.
	Q4	1,912,400	20,796
2017	Q1	1,969,874	21,888	11,626,990
	Q2	2,196,900	24,142
	Q3	3,437,488	37,364		BL10  Tao Poon -  BL11  Bang Sue section on MRT Blue Line opened on 11 August 2017.
	Q4	4,022,728	44,206
2018	Q1	4,005,632	44,508	17,644,588
	Q2	4,120,533	45,281
	Q3	4,791,613	52,083
	Q4	4,726,810	51,379
2019	Q1	4,699,831	52,221	19,726,225
	Q2	4,665,231	52,419
	Q3	5,298,016	57,588
	Q4	5,063,147	55,035
2020	Q1	4,719,549	51,863	16,836,638	1st wave of COVID-19 outbreaks (January 2020 - May 2020)
	Q2	2,208,015	24,264
	Q3	4,840,866	52,619
	Q4	5,068,208	55,089		2nd wave of COVID-19 outbreaks (December 2020 - February 2021)
2021	Q1	3,475,384	38,615	9,841,934
	Q2	1,993,392	21,668		3rd wave of COVID-19 outbreaks (April 2021 - June 2021)
	Q3	1,417,404	15,407		4th wave of COVID-19 outbreaks (July 2021 - early 2022)
	Q4	2,955,754	32,128
2022	Q1	2,946,430	32,739	16,450,757
	Q2	3,569,128	39,222
	Q3	4,691,107	50,991
	Q4	5,244,092	57,001
2023	Q1	5,122,816	56,921	21,508,224
	Q2	4,897,809	53,823
	Q3	5,623,257	61,123
	Q4	5,864,342	63,742		Began using 14-20 Baht fare rates from 16 October 2023.[59]
2024	Q1	6,005,239	65,992	22,657,682
	Q2	5,718,198	62,837
	Q3	6,628,438	72,049
	Q4	4,305,807	70,587		As of November 2024.[61]

Route map

Network map

See also

• Mass Rapid Transit Master Plan in Bangkok Metropolitan Region
• Bangkok Metro
• MRT Blue Line
• MRT Brown Line
• MRT Grey Line
• MRT Light Blue Line
• MRT Orange Line
• MRT Pink Line
• MRT Yellow Line
• BTS Skytrain
• Sukhumvit Line
• Silom Line
• Airport Rail Link (Bangkok)
• SRT Dark Red Line
• SRT Light Red Line
• Bangkok BRT
• BMA Gold Line
• BMA Bang Na-Airport Line

References

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4. https://www.khaosod.co.th/economics/news_2933591. Khaosod ,30 September 2019
5. "MRTA to issue measure to reduce fares to attract passengers".
6. "MRTA Purple Line project".
7. "Construction of southern Purple Line to begin in August". The Nation. 22 April 2022.
8. "MRT Purple Line construction update June 2023". MRTA PR Facebook. 8 June 2023.
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10. "Urban Railway Projects In Bangkok - Measures for Securing Financial Resources" (PDF).
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14. "รถไฟฟ้าสายสีม่วงบางซื่อ-บางใหญ่ฉลุยเซ็นรับเหมาครบ3สัญญา ลงมือก่อสร้างก.พ.นี้ 3 ปีครึ่งเสร็จ !!". www.thailog.org. Retrieved 25 June 2020.
15. "ปิดดีลเดินรถสีน้ำเงิน ครม.ผ่านฉลุย เร่งเซ็นสัญญาจ้าง Bem ทยอยเปิดเดินรถปลายปี 62". mgronline.com. 28 March 2017. Retrieved 25 June 2020.
16. "BEM significant event in 2017" (PDF).
17. "MRTA Purple line accident injures 5". Bangkok Post. 7 June 2013.
18. "คมนาคมตามความคืบหน้ารถไฟฟ้า 10 สาย เร่งสีม่วงเปิดปลายปี'58 ชงคสช.อนุมัติอีก 6 สาย : ประชาชาติธุรกิจออนไลน์". Archived from the original on 17 October 2014. Retrieved 28 July 2014.
19. "ระบบรถไฟฟ้าในกทม.และปริมณฑล".
20. "หนังสือพิมพ์บ้านเมือง » คมนาคม เผยความคืบหน้ารถไฟฟ้า". Archived from the original on 9 October 2014. Retrieved 9 October 2014.
21. พิธีเปิดการเดินรถ และกดปุ่มเปิดระบบรถไฟฟ้าอย่างเป็นทางการ
22. "Fare cut boosts Purple Line riders, but still below target". Bangkok Post. Retrieved 11 September 2016.
23. "Purple Line to connect with MRT on Aug 11". Bangkok Post. 12 July 2017. Retrieved 24 April 2020.
24. "เปิดวิ่งเชื่อมต่อสถานีเตาปูน-บางซื่อ 12.00 วันนี้". bangkokbiznews.com/. 11 August 2017. Retrieved 25 June 2020.
25. "รถไฟฟ้าสายสีม่วงคืบหน้าแล้วกว่า70%". posttoday.com. 4 September 2013. Retrieved 25 June 2020.
26. "Purple Line O&M contract (PDF)" (PDF).
27. 'Purple Line deal agreed BEM signs 30-year contract with MRTA'. Bangkok Post, 5 September 2013
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34. http://www.nationmultimedia.com/detail/Economy/30321793. The Nation, 25 July 2017
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36. https://www.bangkokpost.com/news/transport/1541274/tor-for-slate-of-transport-projects-set-for-fast-track. Bangkok Post, 17 September 2018
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38. Member Yappofloyd meeting with MRTA Planning Division on 7 August 2019 at MRTA Headquarters
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External links

• "BEM Purple Line website"
• "MRTA Purple Line South Extension website"
• Airport Rail Link, BTS, MRT & BRT network map