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A100 Traffic

South London to Tower Hill, London


There are no current incidents or roadworks on the a100. Drag the map to show traffic incidents in the surrounding area.


Traffic incidents

The following traffic incidents and congestion for a100 have been reported by Highways England, Traffic Scotland, Traffic Wales or Transport for London (TfL) in the last two hours:

There are no current incidents in this location.

a100 Roadworks

The following roadworks have been reported by various highways agencies and official transport sources. Click on a roadworks item to view more details on the traffic map.


The A100 is a road in the UK that links the M25 with the North Circular Road, Westway, and Central London. It is around 16 miles/26km in length and runs through small towns and suburban areas to the north-west of London.

The A100 has been in use since the mid-1930s and was designed to speed up the journey times between London and the outskirts of the city. It is an important route for commuters travelling between the north-west London suburbs and the capital.

Statistics show that the A100 is generally a safe road. Latest reports from the Road Safety Foundation show that since the implementation of the current measures in 2015, casualty rates have been significantly reduced. Between 2015 and 2019, the number of serious casualty collisions on the A100 decreased from 11 to 7, while the number of people killed in a collision went down from 1 to 0. The road currently has a lowest risk rating, indicating that it is of a high standard in terms of road safety.

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Please remember that it is against the law to use your mobile phone, tablet or any electronic device without a hands-free kit whilst driving. If you're caught by the police using any device that can send or receive data whilst driving or riding a motorcyle you'll get an automatic fixed penalty notice, 6 points on your licence and a fine of £200. A court could also disqualify you from driving.

Elsewhere on the web:

National Highways TrafficNational Highways England

Official source of traffic updates.

Transport for LondonTransport for London (TFL)

Transport for London's (TfL) portal for transportation in London.

Traffic WalesTraffic Wales

The Welsh government's traffic information service for Wales.

Traffic ScotlandTraffic Scotland

Live traffic conditions and news for Scotland's road network.

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