| 释义 |
- Route
- Benefit
- Upgrading projects
- Interchange along ORRS
- See also
- References
{{EngvarB|date=June 2017}}{{Use dmy dates|date=June 2017}}{{more footnotes|date=February 2014}}{{Infobox road
|country=SGP
|name=Outer Ring Road System
|marker_image=
|map=Expressways and Semi-expressways of Singapore 2012.png
|map_notes=Outer Ring Road System is labelled in double navy blue line
|length_mi=
|length_km=
|length_round=
|length_ref=
|established=
|direction_a=West
|terminus_a=Ayer Rajah (AYE)
|junction=AYE, PIE, NSE, CTE, KPE
|direction_b=East
|terminus_b=Tampines
|history=Introduced in 1994
}}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. RouteThe 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. BenefitWith 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 projectsThe 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 | 1|1 | Type | Remarks | Name of interchange |
|---|
| Portsdown Avenue | Ayer Rajah Expressway | SPUI | Start of ORRS going eastbound; end of ORRS going westbound. | Portsdown Flyover | | Queensway | 3-way | From Portsdown Avenue, it goes straight towards Queensway northbound and the ORRS continues from there. | Queensway Flyover | | Queensway | Commonwealth Avenue | SPUI | – | Queensway Underpass | | 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 | | 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 | | Pan Island Expressway | Parclo | – | Adam Flyover | | Lornie Road | To go from Adam Road to Lornie Road, one can drive on Adam Flyover. | Adam Flyover | | Thomson Road | To go from Lornie Road to Braddell Road, one can drive on MacRitchie Viaduct. | Marymount Flyover, MacRitchie Viaduct, Lornie Viaduct | | Braddell Road | Bishan Road | Semi-directional T | 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. | Bartley Underpass, Upper Serangoon Viaduct | | Bartley Road | Serangoon Avenue 1 | 3-way | – | – | | Upper Paya Lebar Road | In/out from viaduct | 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 | | Bedok North Road | Directional T | 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, Directional T | Start of ORRS leading westbound; end of ORRS leading eastbound. | – |
{{note|1|Note 1}}: Only expressways, arterial roads and major roads will be mentioned. Minor roads will not be mentioned.See also- Expressways of Singapore
- West Coast Highway, Singapore
- Nicoll Highway
References- Outer Ring Road System (ORRS)
- Opening Of Extension Of Queensway To The AYE And Queensway/Commonwealth Avenue Interchange
- 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
- Braddell Road/Thomson Road/Lornie Road Flyover to open in July
{{Expressways of Singapore}} 2 : Roads in Singapore|Ring roads |