This article deals with the system of transport in Bihar, both public and private.
Bihar has national highways with total length of and state highways with total length of . Also. Bihar has of proposed Expressways.
The state is being equipped with more sustainable energy sources, CNG filling stations are being put up in different cities.
To manage overall road transport facilities in the state, Bihar State Road Transport Corporation (BSRTC) was set up in 1959 under the provisions of Road Transport Corporation Act, 1950.
BSRTC operates and maintains a fleet of more than 300 buses connecting all cities and towns within state of Bihar and neighboring states too. BSRTC not only connects every nook and corner of the state but also links this state with other surrounding regions including Uttar Pradesh, Jharkhand, Chhattisgarh, West Bengal and Odisha. However, contract for operation and maintenance of the buses has been given to two private companies viz. GIPL and Royal Cruiser. This contract is based upon public-private partnership (PPP)
Expressways in Bihar are as follows:
These are intra-city short expressways.
Within West-East direction listed from north to south:
Within Northwest-Southeast direction listed from north to south:
Bihar is connected by National Waterway No. 1 which was established in October 1986. This waterway has fixed terminals at Haldia, BISN (Kolkata), Pakur, Farrakka and Patna. It also has floating terminals facilities at Haldia, Kolkata, Diamond Harbour, Katwa, Tribeni, Baharampur, Jangipur, Bhagalpur, Semaria, Doriganj, Ballia, Ghazipur, Varanasi, Chunar and Allahabad.
Patna airport is well connected to cities like Delhi, Mumbai, Kolkata, Bengaluru and many other cities in India. It is categorized as a restricted international airport, with customs facilities to receive international chartered flights. Gaya Airport, is Bihar's only international airport and offers seasonal flights that connect the city to Thailand, Bhutan, and Myanmar. Airlines like IndiGo, SpiceJet and Air India connect various airports in Bihar to cities across India. Darbhanga Airport is another domestic airport in Bihar which is connected with various cities across India. The Darbhanga Airport was built as civil enclave.