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This Diary Post and a comment prompted this question:

"I've attempted to map speed limits, but I rarely find myself walking down a trunk road, and I never try and map whilst driving! If anyone can tell me how they map speed limits I'd be very interested in helping."


asked 19 Feb '17, 08:30

andy%20mackey's gravatar image

andy mackey
accept rate: 4%

edited 19 Feb '17, 18:39

aseerel4c26's gravatar image

aseerel4c26 ♦

I have found a few apps (android in my case) that will control the phone camera and take an image at a voice command. I will report back if i find one that works for me.

(20 Feb '17, 13:29) andy mackey

If your question is "How To" then either stop to make notes where the speed limit changes (though you might class this as a distraction), or use a dashcam or something like Mapillary or OpenStreetCam and check for changes when you're stationary.

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answered 19 Feb '17, 09:46

EdLoach's gravatar image

EdLoach ♦
accept rate: 22%

I don't know what the current status is, but Scout at least had a prototype of real time sign detection in their mobile app:

(19 Feb '17, 14:40) maxerickson

Hi Andy / Ed, What about the good old Dictaphone with a tape or digital, both hands on your wheel, but the pain comes later, listening to rumble or nothing between traffic signs, although quality of a surface is easy to mark in the meantime. Mark/describe the place/situation well.

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answered 19 Feb '17, 14:35

Hendrikklaas's gravatar image

accept rate: 5%

edited 19 Feb '17, 15:47

I created a custom set of buttons for OsmTracker that has a button for each of the normally encountered speed limits in my area all on a single (default) screen. I can just tap the appropriate button as I pass the speed limit sign.

Custom speed limit buttons

If desired, I could post the file and its associated button images but they are for US style MPH signs. No reason the concept couldn't be applied to other countries though.

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answered 19 Feb '17, 17:05

n76's gravatar image

accept rate: 17%

If I understand correctly, while your driving you have OSM open and you just tap the speed limit button as you pass it and it automatically makes changes? That would be amazing!!

(23 Aug '23, 19:38) 352Guy

Not quite that easy. It created a OSM file that had a point with the speed limit information. I still had to use an editor to place the max_speed=* on the road itself. And if it was a location where the speed limit changed I had to split the way.

That app worked on Android. I have since migrated to iPhone and been unable to find an equivalent app. So my current work flow is to use my dashcam. I have documented that at

(23 Aug '23, 19:55) n76

I used the voice note feature with the cheap earpiece n mic that comes with phone purchase, the ideal setting for me is 3 seconds. For pois/street names, I even spell them out sometimes!

(25 Aug '23, 15:19) kucai

Be a passenger, not a driver.

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answered 23 Aug '23, 20:03

SomeoneElse's gravatar image

SomeoneElse ♦
accept rate: 16%

Does that include using self-driving cars? ;)

(24 Aug '23, 00:35) scai ♦

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question asked: 19 Feb '17, 08:30

question was seen: 2,396 times

last updated: 25 Aug '23, 15:19

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum