There are several ring roads in Singapore, of course these are the ones from various places.

Woodlands Ring Road

Woodlands Ring Road is a road in Singapore, that is a smaller road at Admiralty, Singapore.

Yishun Ring Road

Yishun Ring Road is a road in Singapore, that encircles Yishun.

Yishun Ring Road is colored brown on this map.

Bukit Panjang Ring Road

Bukit Panjang Ring Road is a road in Singapore, that starts from Pending, via Bangkit LRT Station, Segar LRT Station, Jelapang LRT Station and Senja LRT Station.

Bukit Panjang Ring Road is colored brown on this map.

References