Acharya Jagadish Chandra Bose Road, earlier known as Lower Circular Road, and its continuation northwards called Acharya Prafulla Chandra Road [Upper Circular Road], is the longest and the most important north-south thoroughfare in Kolkata.

APC Road and AJC Bose Road taken together is the longest road in Kolkata. APC Road emerges from the famous Shyambazar Five-Point Crossing (Paanch mathar more). It then passes through Khanna Crossing, Beadon Street crossing, Manicktala Crossing, Rajabazar Crossing, MG Road Crossing, Sealdah Station and Vidyapati Flyover.

After passing Vidyapati flyover, it is known as AJC Bose Road, which passes through Moulali Crossing, Ripon Sreet Crossing, Elliot Rd. Crossing, Park Street Crossing, Shakespeare Sarani Crossing, Circus Avenue Crossing, Ballygunge Circular Rd Crossing, Lansdowne Crossing (Minto Park), Camac Street Crossing, Lee Road Crossing, Chowringhee Crossing or Exide Crossing, Cathedral Road Crossing (Nandan & Rabindra Sadan on one side), Victoria Memorial, D L Khan Road Crossing, Alipore Road Crossing, Kolkata Race Course on one side and finally finishes its journey at Strand Road - Hastings Crossing. From the Point of Circus Avenue Crossing till the Victoria Memorial, the Road runs below the "AJC Bose Flyover", which is the longest flyover in the City till date at 2.9 kms long, connecting Park Circus till Victoria Memorial.

AJC is a three-letter abbreviation with multiple meanings:

Bose may refer to:

A road is a route, thoroughfare or way that supports travel by a means of conveyance.

For purposes of international statistical comparison, the Organisation for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other than rails or air strips open to public traffic, primarily for the use of road motor vehicles running on their own wheels," which includes "bridges, tunnels, supporting structures, junctions, crossings, interchanges, and toll roads, but not cycle paths." In urban areas roads may diverge through a city or village and be named as streets, serving a dual function as urban space easement and route. Modern roads are normally smoothed, paved, or otherwise prepared to allow easy travel. Historically many roads were simply recognizable routes without any formal construction or maintenance.

In the United States, laws distinguish between public roads, which are open to public use, and private roads, which are privately controlled.

Acharya Sir Jagadish Chandra Bose,CSI,CIE,FRS (Bengali: জগদীশ চন্দ্র বসু Jôgodish Chôndro Boshu) (30 November 1858 – 23 November 1937) was an Indian polymath: a physicist, biologist, botanist, archaeologist, as well as an early writer of science fiction. He pioneered the investigation of radio and microwave optics, made very significant contributions to plant science, and laid the foundations of experimental science in the Indian subcontinent.IEEE named him one of the fathers of radio science. He is also considered the father of Bengali science fiction. He was the first person from the Indian subcontinent to receive a US patent, in 1904. He also invented the crescograph.

Born during the British Raj, Bose graduated from St. Xavier's College, Calcutta. He then went to the University of London to study medicine, but could not pursue studies in medicine due to health problems. Instead, he conducted his research with the Nobel Laureate Lord Rayleigh at Cambridge and returned to India. He then joined the Presidency College of University of Calcutta as a Professor of Physics. There, despite racial discrimination and a lack of funding and equipment, Bose carried on his scientific research. He made remarkable progress in his research of remote wireless signalling and was the first to use semiconductor junctions to detect radio signals. However, instead of trying to gain commercial benefit from this invention, Bose made his inventions public in order to allow others to further develop his research.