Traffic mirrorUnited States

An introduction to the traffic rules and road signs of United States. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.


46. Traffic mirror

A traffic mirror is a convex mirror installed near an intersection, driveway, bend or other location with restricted visibility. Its curved surface provides a wider view of approaching road users than an ordinary flat mirror.

A traffic mirror is only a visibility aid. It may distort distance, speed and direction and may be affected by darkness, weather, dirt or damage. Drivers must continue to observe the road directly, obey all priority rules and proceed only when it is safe.

Traffic mirror
Convex traffic mirror incorporated into the 'Happy Trails Revisited' artwork at Kentuck Knob. (Pennsylvania, United States)
Wikimedia.org • Andre_Carrotflower • CC BY-SA
What is a traffic mirror?

A traffic mirror is a roadside visibility aid that can help users see around a blind corner or obstruction. It gives an indirect view, which may be restricted or distorted; it does not replace checking whether it is safe to proceed.

🔗 monmouthshire.gov.uk • Monmouthshire Council, roadside visibility mirrors

🔗 devon.gov.uk • Devon County Council, mirrors on the highway

🔗 hse.gov.uk • HSE, vehicle-route visibility and mirrors

Does a traffic mirror show an exact image?

No. The reflected image can be distorted, and glare, bad weather or dirt can restrict the view. Judging an approaching vehicle’s speed from a mirror can be difficult. Do not rely on the mirror alone.

🔗 monmouthshire.gov.uk • Monmouthshire Council, roadside visibility mirrors

🔗 devon.gov.uk • Devon County Council, mirrors on the highway

🔗 hse.gov.uk • HSE, vehicle-route visibility and mirrors

Does seeing an empty mirror mean the road is clear?

No. Another road user may be outside the reflected area, hidden by glare or too small to notice. Always check the road directly before proceeding.

🔗 monmouthshire.gov.uk • Monmouthshire Council, roadside visibility mirrors

🔗 devon.gov.uk • Devon County Council, mirrors on the highway

🔗 hse.gov.uk • HSE, vehicle-route visibility and mirrors

1 United States 2 Motorway 3 Expressway 4 Speed limit 5 Minimum speed 6 Advisory speed 7 Bike path 8 Pedestrian warning 9 Tunnel 10 Bridge 11 Speed bump 12 Toll road 13 One-way traffic 14 Slope 15 Bus lane 16 Bus stop 17 Dead end 18 Stop sign 19 Give way 20 Roundabout 21 Road narrowing 22 Pedestrian crossing 23 Railway crossing 24 Mandatory direction 25 Turn prohibition 26 School area 27 Crossing animals 28 Slippery road 29 Rockfall 30 Aircraft 31 Curve 32 Chevron 33 Wrong-way driving 34 Roadworks 35 Height limit 36 Weight limit 37 Radar speed sign 38 Selective barriers 39 Traffic lights 40 Traffic lights warning 41 Pedestrian lights 42 Road markings 43 Bike box 44 Speed feedback 45 Driving licence 46 Traffic mirror 47 Emergency telephone 48 Cycling route 49 Parking 50 No parking 51 No stopping 52 Parallel parking 53 Park and ride 54 Kiss and ride 55 Disabled parking 56 Traffic management 57 Reversing 58 U-turn 59 Carpool 60 Detour 61 Uncontrolled crossroad 62 Ramp 63 Exit 64 Horse riding 65 Emergency exit 66 Runaway truck ramp 67 Oversize load 68 City limit 69 Tourist attraction 70 Horn 71 Axle weight limit 72 Licence plate 73 Charging station 74 Flooding 75 Dip 76 Horse 77 Local traffic 78 Pedestrian 79 Cyclist 80 Motorcycle 81 Truck 82 Bus 83 Police 84 Ambulance 85 Police signals 86 Gravel road 87 Pothole 88 Median strip 89 Public property 90 Path 91 Particulates 92 Air pollution 93 Interchange 94 Rush hour 95 Filling station 96 Road code 97 Two-way traffic 98 Passing lane 99 Street gutter 100 Road debris ...