It is roughly on the western limit of Hoxton in the London Borough of Hackney which straddles both sides of the Ring Road, a road which after taking up a little of the eastern part of Old Street then veers south-east, taking Great Eastern Street, at Apex Junction.
It is sometimes known as St. Agnes Well after the shopping centre beneath it, while the moniker of Silicon Roundabout owes to the local prominence of technology companies.
The main, namely north-east side, the north-western continuation of City Road, and Great Eastern Street are the limit the congestion charge zone (CCZ).
[9][10] In another collision involving a lorry in 2008, a cyclist suffered severe leg injuries, which the police described as "potentially life-changing".
[11] In response to this Transport for London proposed a massive transformation of the roundabout, into a pedestrian square with segregated cycle lanes and road signals.