Buses are increasingly becoming common in the city with some even going to the extents of installing complimentary WiFi systems in partnership with the leading mobile service provider. There are four major bus companies operating the city routes and are the traditional Kenya Bus Service (KBS), and newer private operators Citi Hoppa, Compliant MOA and Double M. The Citi Hoppa buses are distinguishable by their green livery, the Double M buses are painted purple, Compliant MOA by their distinctively screaming names and mix of white, blue colours while the KBS buses are painted blue.