Starting at the northernmost point and moving clockwise, the roads defining the boundary are Pentonville Road, City Road, Old Street, Great Eastern Street, Commercial Street, Mansell Street, Tower Bridge, Tower Bridge Road, New Kent Road, the Elephant & Castle, Kennington Lane, the roads that constitute the Vauxhall one-way system and Vauxhall Bridge, Vauxhall Bridge Road, the roads that constitute the Victoria one-way system, Grosvenor Place, Park Lane, Edgware Road, Marylebone Road and Euston Road.
The route is described as the "Inner" Ring Road because there are two further sets of roads that have been described as London ring roads. The North and South Circular Roads together form the second ring road around London, roughly 10 miles in diameter. The M25 motorway is the outermost road encircling the metropolis, at an average diameter of 40–50 miles.
The road is now one of the busiest main roads in the city. It runs from Edgware Road in the west to The Angel, Islington, in the east. The western section between Edgware Road and Great Portland Street is known as Marylebone Road; the central section between Great Portland Street and King's Cross is known as Euston Road; and the eastern section from King's Cross to The Angel is called Pentonville Road.
Pentonville Road runs west to east from Kings Cross to City Road. By far the greater portion of the road is in the London Borough of Islington but a small part near Kings Cross is in the London Borough of Camden, including and entrance to Kings Cross St Pancras tube station at the former Kings Cross Thameslink station. It acquired its present name in 1857.
This street is distinguished by the "set back" housing lines originally intended to provide an atmosphere of spaciousness along the thoroughfare. It is one of the locations on the London version of the Monopoly board game.
Tower Bridge Road is a road in Bermondsey in the London Borough of Southwark, UK, that runs north to south, and connects the Bricklayers' Arms roundabout and flyover at its southern end (New Kent Road and Old Kent Road) to Tower Bridge and across the River Thames at its northern.
The road has an abundance of antique (or junk) shops along part of its length. There is also Bermondsey Square which holds an 'antique' market every Friday morning, usually known as Bermondsey Market, though officially as New Caledonian Market.
Towards its southern end are a collection of shops, pubs and takeaways.
Starting at the Elephant, Kennington Lane splits off from the A3 by means of a Y-junction, where Newington Butts becomes Kennington Park Road. Heading in a southwesterly direction, the road then crosses the A23 Kennington Road, before reaching the Vauxhall one-way system, where the A3036 Albert Embankment and Wandsworth Road, A202 Vauxhall Bridge, Durham Street and Harleyford Road, A203 South Lambeth Road, and A3205 Nine Elms Lane all converge.
Vauxhall Bridge is where Costa Coffee set up their first coffee shop in 1978.