 With the rising environmental concerns and increasing fuel prices, Cityliner was the first in the country to opt for Compressed Natural Gas (CNG) technology which allows the buses to run on an alternative source of fuel commonly known as Natural Gas.Cityliner was also the first to introduce double-decker stage buses.The additional seating capacity enables Cityliner to carry double number of passengers of single deck at one time thus making it the most efficient among the stage bus providers.