Rawalpindi–Islamabad Metrobus
The Rawalpindi-Islamabad Metrobus is a 83.6 km (51.9 mi) bus rapid transit system operating in the Islamabad–Rawalpindi metropolitan area of Pakistan. It consists of four routes, namely the Red, Orange, Blue, and Green Lines.
Source: Wikipedia — Rawalpindi–Islamabad Metrobus (CC BY-SA 4.0)