Peripheral ring road is now in the plan phase. Ring road areas close to existing population has good potential to grow in price and can be a great investment opportunity.
(Ref: http://blog.propgod.com/bangalore-prr-rebooted/)
(http://bbmp.gov.in/documents/10180/570011/TP+merged.pdf/471e7048-1c89-4236-8726-74da79f510e8)
https://www.quora.com/Where-can-I-find-the-CDP-Bangalore-master-plan
Personal search via expert feedback in real estate business
http://www.mapofbangalore.com/maps/bangalore-rail-map.html