February 2021 Update: Also HADECS speed camera sited between junction 15/16 southbound. I got a ticket from it February 2021.
HADECS Speed Camera on M4/M5 - Junctions 16 and 17, Bristol (70mph)
This HADECS 3 speed camera is located on M4/M5 - Junctions 16 and 17 near Bristol in Somerset, monitoring both directions traffic with a 70mph speed limit.
HADEC 3 speed cameras have been installed on the M4/M5 smart motorway section. They are on both sides of the carriageway, 1. between J17 and J16 Northbound of M5 and 2. also between J17 and J16 Southbound of M5.
Camera type
Speed limit
70mph
Direction
Both directions
Road
M4/M5 - Junctions 16 and 17
Nearest town
Bristol
Last updated
15 May 2026
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Location reference: SWS079
⚠ 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.
About this speed camera location
Speed camera detectors - stay informed on every journey
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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Caught speeding at this location?
If you have been caught speeding at or near this location, the guides below explain what happens next, what your options are, and how the penalty system works in the UK.
Caught speeding - what happens next?
The complete guide from NIP to fine, course, points and court
Notice of Intended Prosecution (NIP)
What the letter means, the 28-day deadline and what to do next
Speeding fines guide
Fixed penalties, Band A/B/C fines, court thresholds and what to expect
Speed awareness course
Eligibility, what to expect on the day and whether it affects your insurance
Penalty points and driving bans
How points work, how long they last and when a ban applies
Speeding and car insurance
When to declare points, how much premiums increase and for how long
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.