Interchange Along ORRS
| Road name | Interchange with 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 |
| Margaret Drive | LILO | Can only be accessed by traffic travelling westbound. | - | |
| 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 | Box | From here, the ORRS splits into two directions: towards Marine Parade and Towards Tampines. | - | |
| Towards Marine Parade | ||||
| Bartley Road East | Hougang Avenue 3 | SPUI | To continue southwards along the ORRS, one needs to turn into Hougang Ave 3. | - |
| Hougang Avenue 3 | Airport Road | Box | - | - |
| Eunos Link | Ubi Avenue 2 & Kaki Bukit Avenue 1 | Box | - | - |
| Bedok Reservoir Road | 3-way | - | - | |
| Jalan Eunos | Pan Island Expressway | SPUI | - | Eunos Flyover |
| Eunos Crescent | 3-way | - | - | |
| Sims Avenue & Sims Avenue East | Box | Sims Avenue & Sims Avenue East travels eastbound only. | - | |
| Changi Road | Box | Changi Road travels westbound | - | |
| Still Road | Joo Chiat Place | Box | - | - |
| Koon Seng Road & Lorong J Telok Kurau | Box | - | - | |
| East Coast Road | Box | - | - | |
| Still Road South | Marine Parade Road | Box | - | - |
| East Coast Parkway | Trumpet, Parclo | Start of ORRS leading westbound; end of ORRS leading eastbound. | Marine Parade Flyover | |
| Towards Tampines | ||||
| Bartley Road East | Hougang Avenue 3 | SPUI | To continue eastwards along the ORRS, one needs to enter the Bartley Viaduct. | 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 : Only expressways, arterial roads and major roads will be mentioned. Minor roads will not be mentioned.
Read more about this topic: Outer Ring Road System
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—François, Duc De La Rochefoucauld (1613–1680)
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