Length (km)	25.5 (24.4 until 1990)
Length (miles)	15.8 (15.2 until 1990)
Status	in service, double tracked since 1959, electrification planned

Date	From		To	Length (miles)	Length (km)	Remark
Openings
??.??.1911	Ma Hlwa Gone	–	Bauktaw	2	3.2
??.??.1926	Bauktaw	–	Mingaladon Cantonment	7	11.3
01.05.1959	Yangon	–	Ma Hlwa Gone	2.5	4	separate double track parallel to C20
01.05.1959	Mingaladon Cantonment	–	Danyingon	3.7	6
??.??.1990	Okkalapa	–	Mingalardonzay	3.2	5.2	new alignment due to extension of Mingaladon Airport
Closures
??.??.1990	Okkalapa	–	Mingalardonzay	2.5	4.1	old alignment via Mingaladon cantonment

	km		Height (m)
		C10 from/to Pyay
	-4.0	Yangon	14
		siding to wharfs
		to Ma Hlwa Gone depot
		C20 and Y02 run in parallel
	0.0	Ma Hlwa Gone (Mahlwagon)	10
		to Ma Hlwa Gone goods station
		C20 to Bago, Mandalay
	3.2	Bauktaw	13
	11.8	Okkalapa	11
		new alignment in 1990 due to
		ext. Mingaladon Airport (+1.1km)
	14.5	Mingaladon Cantonment	18
	17.0	Mingalardonzay	8
		C10 to Pyay
	21.5	Danyingon	8
		C10 from/to Yangon Station

The line from Yangon to Danyingon together with the lines C10 (Yangon –Pyay) and C20 (Yangon – Mandalay) forms the Yangon Circle Line and serves the local mass transport in Yangon, the complete circle has 35 stops. A two miles long branch line was opened from Ma Hlwa Gone on the line C20 (Yangon – Mandalay) to Bauktaw in 1911 which was extended by another seven miles to Mingaladon Cantonment in 1926. The missing link to Danyingon on the line C10 (Yangon – Pyay) was finished in 1959, at the same time the complete line was double tracked and a separate double track was laid from Yangon station to Ma Hlwa Gone station. It was planned to electrify the line, however the plans were never realized due to the lack of electricity in Myanmar. Currently the plans have been revived to electrify he line with the help of Japanese development funds. The expansion of the Mingaladon Airport (Yangon International Airport) runway in 1990 required a relocation of the line around the airport. Today the line is frequented by Circle Line trains in both directions. According to the "New Light of Myanmar" newspaper about 150.000 passengers use this line every day. At Ma Hlwa Gone the tracks have to cross the major line C20 (Yangon – Mandalay) which often leads to delays.

Length (km)	8.0
Length (miles)	5.0
Status	in service, extension to Mogyopit planned, but will most probably not be realized

Date	From		To	Length (miles)	Length (km)	Remark
Openings
04.03.2005	Togyaunggale	–	Dagon University	5.0	8.0

	km		Height (m)
		C20 from/to Yangon Station
		Y03 from/to Thanlyin
	0.0	Togyaunggale	9
		C20 to Bago, Mandalay
	8.0	Dagon University	7
		PY1 ext. to Mogyopit planned

After the student uprisings in 1988, the military junta had decided to relocate the universities from downtown Yangon to remote suburbs Dagon (this line), Thanlyin (lines Y03 and Y04) and Hlaw Karr (lines Y05) in order to prevent further uprisings. All universities were connected to the railway network. The short branch between Togyaunggale on the line C20 (Yangon – Mandalay) and Dagon University was opened in 2005. Most of the trains running on the line are direct trains from Yangon Station using Japanese kiha railcars. A further extension of the branch line to Mogyopit on the line C10 (Yangon – Pyay) which would form a second circle line around Yangon was planned by the military junta, but will most probably not be constructed (see line PY1).

Length (km)	27.0
Length (miles)	16.8
Status	in service

Date	From		To	Length (miles)	Length (km)	Remark
Openings
31.07.1993	Togyaunggale	–	Okkphosu	8.5	13.6
15.11.2003	Okkphosu	–	Thilawa	8.3	13.4

	km		Height (m)
		C20 from/to Bago, Mandalay
		Y02 from/to Dagon University
	0.0	Togyaunggale	9
		C20 from/to Yangon Station
		Bago River
	13.6	Okkphosu	6
		Y04 from/to Thanlyin University
	27.0	Thilawa (Deep Sea Port)	6

As the old port along the Strand Road at downtown Yangon became more and more useless as large vessels were unable to reach this port due to lack of sufficient water depth a new deep seawater port was constructed at Thilawa southeast of Yangon; it was opened on the 9th of November 1997. However it took another six years until the port was connected to the railway network. First parts of the line were already opened ten years earlier on the 31st of July 1993 excluding the bridge over the Bago River.

Length (km)	5.4
Length (miles)	3.4
Status	in service, extension to Thongwa planned, but will most probably not be realized

Date	From		To	Length (miles)	Length (km)	Remark
Openings
??.06.2004	Okkphosu	–	Thanlyin University	3.4	5.4

	km		Height (m)
		Y03 from/to Togyaunggale
	0.0	Okkphosu	6
		Y03 from/to Thilawa
	1.7	PC1 from/to Thongwa
	5.4	Thanlyin University	6

After the student uprisings in 1988, the military junta had decided to relocate the universities from downtown Yangon to remote suburbs Dagon (line Y02), Thanlyin (this line) and Hlaw Karr (lines Y05) in order to prevent further uprisings. All universities were connected to the railway network. The short branch between Okkphosu on the line Y03 (Togyaunggale – Thilawa) and Thanlyin University was opened in 2004. Most of the trains running on the line are direct trains from Yangon Station using Japanese kiha railcars. A further extension of the branch line to Thongwa was planned by the military junta, but will most probably not be constructed (see line PC1).

Length (km)	33.0
Length (miles)	20.5
Status	most probably out of service

Date	From		To	Length (miles)	Length (km)	Remark
Openings
27.03.1989	Dabein	–	Hle Lawin	20.5	33.0

	km		Height (m)
		C20 from/to Yangon Station
	0.0	Dabein	9
		C20 from/to Bago, Mandalay
	33.0	Hle Lawin	18

This line was built in the late 1980s. The reason for building this line remains a secret for me. According to Google maps the line seems to end up in an Army camp (maybe that's the reason for building the line).