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Speed feedbackFrance

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Traffic signs
Traffic rules
France

61. Speed feedback

Speed feedback is a traffic-safety system that measures an approaching vehicle's speed and displays it back to the driver. The display may show the measured speed together with a message, colour or symbol indicating whether the vehicle is travelling within the applicable speed limit.

Speed feedback displays are intended primarily to make drivers aware of their speed and encourage them to slow down when necessary. They normally serve a preventive or educational purpose rather than establishing a new speed limit.

Speed feedback
Vehicle speed-feedback display. (France)
Wikimedia.org • Julien Bertrand • CC0
What is a speed feedback display?

A speed feedback display is an electronic roadside device that measures an approaching vehicle's speed and shows that speed to the driver.

Why are speed feedback displays used?

They are used to increase drivers' awareness of their actual speed and encourage compliance with the applicable speed limit.

Does a speed feedback display set the speed limit?

Normally, no. The legally applicable speed is determined by the traffic rules and regulatory speed-limit signs, while the feedback display simply informs the driver of their measured speed.

1 France 2 Motorway 3 Expressway 4 Residential area 5 Zone 6 Speed limit 7 Minimum speed 8 Advisory speed 9 Footpath 10 Bike path 11 Pedestrian warning 12 Tunnel 13 Bridge 14 Cycling street 15 Pedestrian zone 16 Speed bump 17 Toll road 18 Customs 19 One-way traffic 20 Quay 21 Slope 22 Bus lane 23 Bus stop 24 Dead end 25 Stop sign 26 Give way 27 Roundabout 28 Priority road 29 Road narrowing 30 Priority over oncoming traffic 31 Give way to oncoming traffic 32 Pedestrian crossing 33 Railway crossing 34 Mandatory direction 35 Turn prohibition 36 School area 37 Overtaking 38 Crossing animals 39 Slippery road 40 Rockfall 41 Aircraft 42 Curve 43 Chevron 44 Wrong-way driving 45 Roadworks 46 Crosswind 47 Height limit 48 Width limit 49 Length limit 50 Weight limit 51 Radar speed sign 52 Selective barriers 53 Low-emission zone 54 Priority at the next junction 55 Traffic lights 56 Traffic lights warning 57 Pedestrian lights 58 Road markings 59 Junction layout 60 Bike box 61 Speed feedback 62 Driving licence 63 Location marker 64 Road number 65 Countdown markers 66 Public toilet 67 Rest area 68 Traffic mirror 69 Emergency telephone 70 International border 71 Cycling route 72 End of restriction 73 Parking 74 No parking 75 No stopping 76 Parallel parking 77 Alternate-side parking 78 Parking meter 79 Parking disc 80 Disabled parking 81 Traffic management 82 Merging 83 Reversing 84 U-turn 85 Carpool 86 Traffic jam 87 Uncontrolled crossroad 88 Road surface 89 Ring road 90 Exit 91 Information point 92 Horse riding 93 Provisional licence 94 Hazardous cargo 95 Emergency exit 96 Runaway truck ramp 97 Radio service 98 Oversize load 99 Lane 100 Tyre inflation station ...