Singapore Buses route 191

Service 191 is a trunk route running from Buona Vista Terminal and looping at Portsdown Road, passing through North Buona Vista Road.

Service 191 primarily serves low-density private housing estates at Portsdown Road with connections to Buona Vista MRT and Holland. The route also serves the Fusionopolis development near one-north.

Before its BSEP addition, the service was running with only 1 bus, with one of the lowest frequencies of any bus service in Singapore. Two Mercedes-Benz Citaro buses were added under the BSEP scheme in 2013, which is also considered Android's.