Outer Ring Road System: Difference between revisions

Outer Ring Road System
Outer Ring Road System
	Outer Ring Road System is labelled in double navy blue line
Route information
History	Introduced in 1994
Major junctions
West end	Ayer Rajah (AYE)
	AYE, PIE, NSC, CTE, KPE
East end	Tampines
Location
Country	Singapore
Highway system
	Expressways of Singapore;

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The Outer Ring Road System, or more commonly known as ORRS, is a network of major arterial roads in Singapore that forms a ring road through the towns along the city fringe. The ORRS is a semi-expressway, just like the West Coast Highway. Since 1994, roads along the ORRS have been upgraded in stages to provide a smoother route to travel across the island. Roads and interchanges along the ORRS are constantly being upgraded to cater to the ever increasing traffic demand. It starts as Portsdown Avenue in Queenstown and ends as Tampines Avenue 10 in Tampines. The series of roads passes through the areas of Queenstown, Bukit Timah, Central Catchment Nature Reserve, Bishan, Toa Payoh, Geylang and Tampines.

Route

The route of the ORRS forms a semi-circle shape, connecting several expressways and major arterial roads. Travelling from west to east in a clockwise direction, the route begins at Queenstown with a connection to the Ayer Rajah Expressway. The route continues northward through the residential areas of Bukit Timah via Farrer Road and Adam Road, with the first connection to the Pan Island Expressway. The route continues east through Bukit Brown, Toa Payoh, Bishan and Bartley, via the MacRitchie Viaduct and Lornie Viaduct and a connection to the Central Expressway. From here, the route travels eastwards to Kaki Bukit and Tampines through a series of viaducts.

Benefit

With the ORRS, traffic volume on city-bound roads will be reduced. It also provides an alternative route east-west travel for motorists without going through the city. Since ORRS is extensively linked to expressways and other arterial roads, such as Bukit Timah Road, motorists can get from one traffic route to another easily.

Upgrading projects

The first upgrading project started in 1994, with two intersections along Farrer Road being the first to be upgraded. The upgrading projects had to be carried out in stages to minimise disruption to traffic. The completion of the Portsdown Flyover, Queensway Flyover and Queensway Underpass marks another milestone in the realisation of the ORRS. The Farrer Road section of the upgrading project completed in 2009.

Interchange along ORRS

Road name	Interchange with ¹	Type	Remarks	Name of interchange
Portsdown Avenue	Ayer Rajah Expressway	Diamond	Start of ORRS going eastbound; end of ORRS going westbound.	Portsdown Flyover
Portsdown Avenue	Queensway	3-way	From Portsdown Avenue, it goes straight towards Queensway northbound and the ORRS continues from there.	Queensway Flyover
Queensway	Commonwealth Dr	3-way	-	-
Queensway	Commonwealth Avenue	SPUI	Queensway Underpass offers a non-stop drive through this interchange.	Queensway Underpass
Queensway	Commonwealth Dr	LILO	-	-
Farrer Road	Holland Road	Three-level diamond	To go from Queensway to Farrer Road, one can drive through the Farrer Underpass.	Farrer Underpass, Holland Flyover
Farrer Road	Leedon Heights	3-way	-	-
Farrer Road	Empress Road	3-way	-	-
Farrer Road	Bukit Timah Road	Three-level diamond	Bukit Timah Road travels westward only, access the Farrer Flyover to stay on the ORRS.	Farrer Flyover, Bukit Timah Underpass
Adam Road	Dunearn Road	Three-level diamond	Dunearn Road travels east bound only, access the Farrer Flyover to stay on the ORRS.	Farrer Flyover, Dunearn Underpass
Adam Road	Pan Island Expressway	Parclo	–	Adam Flyover
Lornie Highway	Lornie Road	Slip lane	To go from Adam Road to Lornie Highway, one can drive on Adam Flyover. An alternative road is Lornie Road, which is parallel to Lornie Highway, although Lornie Road has a longer distance than Lornie Highway.	Adam Flyover
Thomson Road			To go from Lornie Highway to Braddell Road, one can drive on MacRitchie Viaduct.	Marymount Flyover, MacRitchie Viaduct, Lornie Viaduct
Braddell Road	Bishan Road	Seagull	Bishan Flyover offers a non-stop drive through this interchange.	Bishan Flyover
	Lorong 6 Toa Payoh	Trumpet	–	Toa Payoh North Flyover
	Bishan Street 11	LILO	Can only be accessed by traffic travelling eastbound.	–
	Lorong 8 Toa Payoh	Slip lane	Lorong 8 Toa Payoh only allows traffic to travel westbound only. Vehicles are not permitted to leave the ORRS here.	–
	Central Expressway, Lorong Chuan	3-level SPUI	Braddell Underpass offers a non-stop drive through this interchange.	Braddell Underpass, Braddell Flyover
	Upper Serangoon Road	Three-level diamond	To go from Braddell Road to Bartley Road, one can drive through Bartley Underpass. This interchange is Singapore's first four-tier interchange, with, from highest to lowest, Upper Serangoon Viaduct, Upper Serangoon Road, Bartley Underpass and North East line tunnel.	Woodleigh Underpass, Upper Serangoon Viaduct
Bartley Road	Serangoon Avenue 1	3-way	–	–
Bartley Road	Upper Paya Lebar Road	3-level SPUI	Only motorists travelling eastbound can only enter and exit to Upper Paya Lebar Road.
Bartley Road East	Hougang Avenue 3	SPUI		Bartley Viaduct
	Airport Road	SPUI	Only motorists travelling westbound can only enter and exit to Airport Road.	Bartley Viaduct
	KPE	SPUI		Bartley Viaduct
	Kaki Bukit Ave 4	LILO	-	-
Bartley Road East	Bedok North Road	Seagull	To go from Bartley Road East to Tampines Avenue 10, one can drive on Kaki Bukit Viaduct.	Kaki Bukit Viaduct
Tampines Avenue 10	Tampines Avenue 1	Box, Seagull	Start of ORRS leading westbound; end of ORRS leading eastbound.	–

^Note 1 : Only expressways, arterial roads and major roads will be mentioned. Minor roads will not be mentioned.

References

@@ Line 15: / Line 15: @@
 |direction_a=West
 |terminus_a=[[Ayer Rajah]] ([[Ayer Rajah Expressway|AYE]])
-|junction=[[Ayer Rajah Expressway|AYE]], [[Pan Island Expressway|PIE]], [[North-South Expressway, Singapore|NSE]], [[Central Expressway, Singapore|CTE]], [[Kallang-Paya Lebar Expressway|KPE]]
+|junction=[[Ayer Rajah Expressway|AYE]], [[Pan Island Expressway|PIE]], [[North-South Expressway, Singapore|NSC]], [[Central Expressway, Singapore|CTE]], [[Kallang-Paya Lebar Expressway|KPE]]
 |direction_b=East
 |terminus_b=[[Tampines]]
@@ Line 21: / Line 21: @@
 }}
-The '''Outer Ring Road System''', or more commonly known as '''ORRS''', is a network of major arterial roads in Singapore that forms a ring road through the towns along the city fringe. The ORRS is a semi-expressway, just like the [[West Coast Highway, Singapore|West Coast Highway]]. Since 1994, roads along the ORRS have been upgraded in stages to provide a smoother route to travel across [[Singapore|the island]]. Roads and interchanges along the ORRS are constantly being upgraded to cater to the ever increasing traffic demand. It starts as [[Portsdown Avenue]] in [[Queenstown, Singapore|Queenstown]] and ends as [[Tampines Avenue 10]] in [[Tampines]]. The series of roads passes through the areas of Queenstown, [[Bukit Timah]], [[Central Catchment Nature Reserve]], [[Bishan, Singapore|Bishan]], [[Toa Payoh]], [[Geylang]] and [[Tampines]].
+The '''Outer Ring Road System''', or more commonly known as '''ORRS''', is a network of major arterial roads in Singapore that forms a ring road through the towns along the city fringe. The ORRS is a semi-expressway, just like the [[West Coast Highway, Singapore|West Coast Highway]]. Since 1994, roads along the ORRS have been upgraded in stages to provide a smoother route to travel across [[Singapore|the island]]. Roads and interchanges along the ORRS are constantly being upgraded to cater to the ever increasing traffic demand. It starts as Portsdown Avenue in [[Queenstown, Singapore|Queenstown]] and ends as Tampines Avenue 10 in [[Tampines]]. The series of roads passes through the areas of Queenstown, [[Bukit Timah]], [[Central Catchment Nature Reserve]], [[Bishan, Singapore|Bishan]], [[Toa Payoh]], [[Geylang]] and [[Tampines]].
 ==Route==
-The route of the ORRS forms a semi-circle shape, connecting several expressways and major arterial roads. Travelling from west to east in a clockwise direction, the route begins at [[Queenstown, Singapore|Queenstown]] with a connection to the [[Ayer Rajah Expressway]]. The route continues northward through the residential areas of [[Bukit Timah]] via Farrer Road and Adam Road, with the first connection to the [[Pan Island Expressway]]. The route continues east through Bukit Brown, [[Toa Payoh]], [[Bishan, Singapore|Bishan]] and [[Bartley, Singapore|Bartley]], via the [[MacRitchie Viaduct|MacRitchie Viaduct and Lornie Viaduct]] and a connection to the [[Central Expressway, Singapore|Central Expressway]]. From here, the route travels eastwards to [[Kaki Bukit]] and [[Tampines]] through a [[Bartley Road#Bartley Road Extension Project|series of viaducts]].
+The route of the ORRS forms a semi-circle shape, connecting several expressways and major arterial roads. Travelling from west to east in a clockwise direction, the route begins at [[Queenstown, Singapore|Queenstown]] with a connection to the [[Ayer Rajah Expressway]]. The route continues northward through the residential areas of [[Bukit Timah]] via Farrer Road and Adam Road, with the first connection to the [[Pan Island Expressway]]. The route continues east through [[Bukit Brown]], [[Toa Payoh]], [[Bishan, Singapore|Bishan]] and [[Bartley, Singapore|Bartley]], via the MacRitchie Viaduct and Lornie Viaduct and a connection to the [[Central Expressway, Singapore|Central Expressway]]. From here, the route travels eastwards to [[Kaki Bukit]] and [[Tampines]] through a [[Bartley Road#Bartley Road Extension Project|series of viaducts]].
 ==Benefit==
@@ Line 30: / Line 30: @@
 ==Upgrading projects==
-The first upgrading project started in 1994, with two intersections along Farrer Road being the first to be upgraded. The upgrading projects had to be carried out in stages to minimise disruption to traffic. The completion of the Portsdown Flyover, Queensway Flyover and Queensway Underpass marks another milestone in the realisation of the ORRS. The Farrer Road section of the upgrading project is expected to be completed by 2009.
+The first upgrading project started in 1994, with two intersections along Farrer Road being the first to be upgraded. The upgrading projects had to be carried out in stages to minimise disruption to traffic. The completion of the Portsdown Flyover, Queensway Flyover and Queensway Underpass marks another milestone in the realisation of the ORRS. The Farrer Road section of the upgrading project completed in 2009.
 ==Interchange along ORRS==
@@ Line 43: / Line 43: @@
 | rowspan=2|'''Portsdown Avenue'''
 | Ayer Rajah Expressway
-| [[Single-point urban interchange|SPUI]]
+| [[Diamond interchange|Diamond]]
 | Start of ORRS going eastbound; end of ORRS going westbound.
 | Portsdown Flyover
@@ Line 52: / Line 52: @@
 | Queensway Flyover
 |-
-| rowspan=2|'''Queensway'''
+| Queensway
+| Commonwealth Dr
+| 3-way
+| -
+| -
+|-
+| rowspan=1|'''Queensway'''
 | Commonwealth Avenue
 | [[Single-point urban interchange|SPUI]]
+| Queensway Underpass offers a non-stop drive through this interchange.
-| –
 | Queensway Underpass
+|-
+| Queensway
+| Commonwealth Dr
+| [[Right-in/right-out|LILO]]
+| -
+| -
 |-
 | rowspan=2|'''Farrer Road'''
@@ Line 64: / Line 76: @@
 | Farrer Underpass, Holland Flyover
 |-
+| Leedon Heights
+| 3-way
+| -
+| -
+|-
+| Farrer Road
+| Empress Road
+| 3-way
+| -
+| -
+|-
+| Farrer Road
 | [[Bukit Timah Road]]
 | [[Three-level diamond interchange|Three-level diamond]]
@@ Line 80: / Line 104: @@
 | Adam Flyover
 |-
-| colspan=3|'''Lornie Road'''
+| rowspan=1|'''Lornie Highway'''
+| Lornie Road
-| To go from Adam Road to Lornie Road, one can drive on Adam Flyover.
+| [[Slip lane]]
+| To go from Adam Road to Lornie Highway, one can drive on Adam Flyover. An alternative road is Lornie Road, which is parallel to Lornie Highway, although Lornie Road has a longer distance than Lornie Highway.
 | Adam Flyover
 |-
 | colspan=3|'''Thomson Road'''
-| To go from Lornie Road to Braddell Road, one can drive on [[MacRitchie Viaduct]].
+| To go from Lornie Highway to Braddell Road, one can drive on MacRitchie Viaduct.
 | Marymount Flyover, MacRitchie Viaduct, Lornie Viaduct
 |-
 | rowspan=6|'''Braddell Road'''
 | Bishan Road
+| [[Seagull intersection|Seagull]]
-| [[Directional T interchange|Semi-directional T]]
 | Bishan Flyover offers a non-stop drive through this interchange.
 | Bishan Flyover
@@ Line 100: / Line 126: @@
 |-
 | Bishan Street 11
-| [[Right-in/right-out|LILO]]
+| LILO
 | Can only be accessed by traffic travelling eastbound.
 | –
@@ Line 110: / Line 136: @@
 |-
 | Central Expressway, [[Lorong Chuan]]
-| [[Single-point urban interchange|3-level SPUI]]
+| [[Single-point urban interchange#Three-level SPUI|3-level SPUI]]
 | Braddell Underpass offers a non-stop drive through this interchange.
 | Braddell Underpass, Braddell Flyover
@@ Line 116: / Line 142: @@
 | [[Upper Serangoon Road]]
 | [[Three-level diamond interchange|Three-level diamond]]
-| To go from Braddell Road to Bartley Road, one can drive through [[Bartley Road|Bartley Underpass]]. This interchange is Singapore's first four-tier interchange, with, from highest to lowest, [[Upper Serangoon Viaduct]], [[Serangoon#Serangoon Road and Upper Serangoon Road|Upper Serangoon Road]], Bartley Underpass and [[North East MRT Line|North East Line]] tunnel.
+| To go from Braddell Road to Bartley Road, one can drive through [[Bartley Road|Bartley Underpass]]. This interchange is Singapore's first four-tier interchange, with, from highest to lowest, Upper Serangoon Viaduct, [[Serangoon#Serangoon Road and Upper Serangoon Road|Upper Serangoon Road]], Bartley Underpass and [[North East MRT line|North East line]] tunnel.
-| Bartley Underpass, Upper Serangoon Viaduct
+| Woodleigh Underpass, Upper Serangoon Viaduct
 |-
 | rowspan=2|'''Bartley Road'''
@@ Line 126: / Line 152: @@
 |-
 | Upper Paya Lebar Road
+| 3-level SPUI
-| In/out from viaduct
 | Only motorists travelling eastbound can only enter and exit to Upper Paya Lebar Road.
 |
@@ Line 143: / Line 169: @@
 | [[Kallang-Paya Lebar Expressway|KPE]]
 |-
+| Kaki Bukit Ave 4
+| LILO
+| -
+| -
+|-
+| Bartley Road East
 | Bedok North Road
+| [[Seagull intersection|Seagull]]
-| [[Directional T interchange|Directional T]]
 | To go from Bartley Road East to Tampines Avenue 10, one can drive on Kaki Bukit Viaduct.
 | Kaki Bukit Viaduct
@@ Line 150: / Line 182: @@
 | '''Tampines Avenue 10'''
 | Tampines Avenue 1
-| Box, [[Directional T interchange|Directional T]]
+| Box, [[Seagull intersection|Seagull]]
 | Start of ORRS leading westbound; end of ORRS leading eastbound.
 | –
@@ Line 160: / Line 192: @@
 * [[West Coast Highway, Singapore]]
 * [[Nicoll Highway]]
-* [[List of major roads in Singapore]]
 ==References==
 * [http://www.onemotoring.com.sg/publish/onemotoring/en/on_the_roads/road_projects/orrs.html Outer Ring Road System (ORRS)]
-* [http://app.lta.gov.sg/corp_press_content.asp?start=1333 Opening Of Extension Of Queensway To The AYE And Queensway/Commonwealth Avenue Interchange]
+* [https://web.archive.org/web/20071008011122/http://app.lta.gov.sg/corp_press_content.asp?start=1333 Opening Of Extension Of Queensway To The AYE And Queensway/Commonwealth Avenue Interchange]
-* [http://app.mot.gov.sg/data/s_05_08_13.htm Speech by Mrs Lim Hwee Hua, Minister of State for Transport and Finance, at the opening of the extension of Queensway to Ayer Rajah Expressway and Queensway Underpass on Saturday, 13 August 2005, 9.15 am]
+* [https://web.archive.org/web/20070928033831/http://app.mot.gov.sg/data/s_05_08_13.htm Speech by Mrs Lim Hwee Hua, Minister of State for Transport and Finance, at the opening of the extension of Queensway to Ayer Rajah Expressway and Queensway Underpass on Saturday, 13 August 2005, 9.15 am]
 * [http://www.channelnewsasia.com/stories/singaporelocalnews/view/336291/1/.html Braddell Road/Thomson Road/Lornie Road Flyover to open in July]

v t e Major roads and expressways of Singapore
Road names in Singapore
Expressways	Ayer Rajah Bukit Timah Central East Coast Parkway Kallang-Paya Lebar Kranji Marina Coastal North–South Corridor Pan-Island Seletar Tampines
Semi-expressways	Bukit Timah Road Jurong Island Highway Nicoll Highway Outer Ring Road System West Coast Highway
Major roads	Anson Balestier Bartley Beach Road Bencoolen Street Bras Basah Cantonment Choa Chu Kang Clementi Collyer Quay Dunearn East Coast Eu Tong Sen Street Geylang Hill Street Holland Road Jalan Ahmad Ibrahim Jalan Bahar Jalan Besar Jalan Boon Lay Jalan Bukit Merah Jalan Buroh Jalan Eunos Jalan Kayu Jurong Jurong Town Hall Kallang Lim Chu Kang Lorong Chuan MacPherson Mandai Marina Boulevard Napier Neil New Bridge North Bridge North Buona Vista Old Choa Chu Kang Ophir Orchard Pasir Panjang River Valley Robinson Scotts Sembawang Serangoon Shenton Way Sims Avenue South Bridge Stamford Road Sungei Tanglin Telok Blangah Thomson Upper Bukit Timah Upper Serangoon Upper Thomson Victoria Street
Cancelled	Singapore Underground Road System