HADECS Speed Camera on M25 Junctions 5-7: Smart Motorway, M25 between junctions 5 and 6/7 (70mph)

70mph speed limit HADECS speed camera

This HADECS 3 speed camera is located on M25 Junctions 5-7: Smart Motorway near M25 between junctions 5 and 6/7 in Kent, monitoring northbound traffic with a 70mph speed limit.

BEWARE of new speed camera called HADECS 3 now installed and operating on the M25 smart motorway between junctions 5 and 6/7 - Sevenoaks and the M25. This Hadecs system caught 668 motorists between 22nd October and 25th November 2014 alone.

Camera type
Speed limit
70mph
Direction
Northbound
Road
M25 Junctions 5-7: Smart Motorway
Nearest town
M25 between junctions 5 and 6/7
Last updated
15 May 2026
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Location reference: SEK038

⚠ Don't get caught at this location

Many drivers are caught at speed camera locations like this after misjudging the transition between speed limits or failing to notice the camera in time. A speed camera detector gives you advance warning before you reach known fixed and mobile camera locations.

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About this speed camera location

Being a smart motorway the hard shoulder is used when the road is busy and the speed limit can be changed from 70mph to 60mph, 50mph or even as low as 40mph. Look out for the overhead variable speed limit changes and STICK to them.

The cameras themselves are almost impossible to spot, as they are small and grey in colour. Some are sited besides the road, while others are in the overhead gantries. Read more about HADECS 3 here.

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A speed camera detector alerts you as you approach known fixed and mobile camera locations like this one - giving you time to check your speed before you reach the enforcement zone. Speed camera detectors are completely legal in the UK. All detectors are available from ActiveGPS.co.uk.

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HADECS 3 speed cameras

This camera is a HADECS 3 - commonly found on smart motorway gantries.

They monitor multiple lanes at once and are easy to miss if you are not looking for them.

Read more about HADECS 3 cameras and how they work.

SpeedCamerasUK video guide