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 |
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 |
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 |
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 |
– |
– |
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 |
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. |
– |