Motor transport is the commonest means of local transport in India. Commuter rail services are available only in the six metropolitan cities of Delhi, Mumbai, Bangalore, Chennai, Kolkata ( West Bengal ), and Hyderabad. At least 25 cities in the country have regular bus services. Bus services account for more than 90% of public transportation system in the cities of India. It is an affordable and suitable means of transport for every tier of the society. The bus services are predominantly operated by transport companies that are held by the state government. Now, the Bus Rapid Transit (BRT) system has been introduced in the country in cities like Delhi, Pune, and Ahmedabad. In many cities, the air conditioned (AC) buses are running. The biggest bus terminus in Asia is situated in the city of Chennai and it is known as Chennai Mofussil Bus Terminus. Other than these buses, there are Double Decker Buses in cities like Chennai, Mumbai, and Trivandrum. North Eastern States like Sikkim , Mizoram , Assam, Manipur , Meghalaya , Tripura etc. too don't have that much of a well developed transport system.Taxis or cars are the primary sources of transportation used here. Taxis are mostly Hindustan Ambassador or Premier Padmini cars. Of late, vehicles like Maruti Esteem, Chevrolet Tavera, Mahindra Renault Logan, Maruti Omni, Toyota Innova, Tata Indica, Tata Indigo and Hyundai Santro are also used as taxis.