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UK Speed Limits - Editing Guidelines and Tips

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:!: These guidelines are superseded by the Wazeopedia page on Speed Limits since 11 Nov 2017.
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Guidelines for Speed Limits:
  • Make sure you have the correct units set! Having metric selected does not work well with mph
  • Split segments at the exact point the speed limit comes into force
    (unless it's within a few hundred yards of a T junction where traffic will be slowing down anyway)
  • Roundabouts don't need to have limits, but do set them if they are clearly marked on approach
  • Ramps should be left without any speed limit, unless explicitly signed with one
  • Advisory limits on sharp bends should not be mapped. Only legal signs with red borders (or NSL)
  • Also, speed limits on private roads and car parks (e.g. 10 or 15 mph) do not need to be set
  • Do keep an eye out for other mapping issues along the way, and fix those too!
If there are some stretches of highway that need limits setting, but are locked above your level, then we will consider doing a bulk unlock of those highways. Simply post a zoom=2 permalink via the usual channel. I still don't think we'll be unlocking ordinary Streets at this time, unless they have incorrect verified speed limits. Special dispensations may be given within London.

Tips for Finding Speed Limits:
  • Look on aerial view for speed limit signs painted on the road: red band with white numbers
  • Schools are easy to spot from the air, and are often surrounded by 20 mph zones
  • Use the integrated Street View feature to look for where speed limits start/stop
  • If all the side roads are posted at 30 mph, then the main road is going to be 40 mph or higher
    If you can get to see the back of those signs, you'll usually see what the limit is for the main road
  • Look out for those tiny repeater speed limit signs on poles of street lights
  • For dual-carriageways, look for speed limits posted at the end of exit/entry ramps
  • Existing speed cameras can be used as reference points
Bonus Tips:

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Last edited by Timbones on Sun Nov 12, 2017 5:48 pm, edited 1 time in total.
Reason: These guidelines are superseded by the Wazeopedia page

Re: UK Speed Limits - Editing Guidelines and Tips

Post by AigarsABCD
Thanks for the update.

I've seen this in several places.
https://www.google.co.uk/maps/@51.41110 ... 6656?hl=lv

Should there be a set speed limit of 30 mph or no limit at all?
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by AndyPot2
AigarsABCD wrote: I've seen this in several places.
https://www.google.co.uk/maps/@51.41110 ... 6656?hl=lv

Should there be a set speed limit of 30 mph or no limit at all?
I believe this is an advisory limit only, if it hasn't got a red circle around it then it is not a speed limit. See the guidelines in the first post about advisory limits.

If you see this sort of sign then you need to check what the speed limit is in that area, don't assume 30mph, look back for the previous sign, but in this case (assuming streetview is up to date) I believe it should be 30mph.
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Last edited by AndyPot2 on Tue Feb 02, 2016 1:07 pm, edited 1 time in total.

Re: UK Speed Limits - Editing Guidelines and Tips

Post by atrophicshiner
Am I to assume that until an official announcement is made we are to follow the guidance in the original post. Wouldn't want to litter the map with hundreds on 5m segments :o
Timbones wrote:Guidelines for Speed Limits:
  • Split segments at the exact point the speed limit comes into force
    (unless it's within a few hundred yards of a T junction where traffic will be slowing down anyway)
After all, shouldn't the Wazer be looking out that big window thing for the big round things with red borders :twisted:
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by atrophicshiner
hublander wrote:So 9 mph is a valid speed limit then since if you don't set a 20, 30, 40, 50, 60 or 70mph waze says it is not a valid speed limit. ;)
Valid maybe, but I'm assuming this is not an adopted highway otherwise the local authority have to be involved. If private land then the speed limit can be anything random.
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by atrophicshiner
Well I've caused havoc around the 0.7% of the UK that I can edit and set all A-Roads with their (hopefully correct) speed limits.

If the CAs get desperate enough to need an area reviewing then I'm happy to jump in where required :shock:
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by BaldIbis
theC3lt wrote:Some of the roads in Norwich have the wrong speed limit set.
Your comments are noted; when I've finished doing Bath's 20 mph zones I'll start reviewing Norwich.
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by BaldIbis
I have two related questions I can't see addressed anywhere in this thread.
1) What actually defines when a segment is classified as Verified. Is it a relationship between; road type /Speed limit and editors level?
2) When I find unverified segments but can establish the correct limit, can I then verify even if the original editor was a higher level.
Thanks - Martyn
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Re: Status of UK Speed Limits - March 28th, 2016

Post by Challenger3802
Timbones wrote: Here's a recent heatmap showing segments with verified segments (Motorways and A Roads)
speed-limits-uk.png
We have verified speed limits on more than 95% of motorways now! :)
Is there any way of zooming in on the heat map (and in particular for Kent ;) ) as I'd quite like to know which roads in my area need attention?

Many thanks,
Ian
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Re: UK Speed Limits - Editing Guidelines and Tips

Post by Challenger3802
Timbones wrote:In case anyone hasn't seen these yet, here are two community apps for submitting speed limit reports directly from your phone while driving. These reports will appear on the map as URs, with some useful information:

viewtopic.php?f=819&t=182751 (Web App)
viewtopic.php?f=819&t=184699 (Android App)
Well the Android version downloads okay - as long as you enable third party app's to install - only time will tell if it is successful on drives. I look forward to using it on the move.

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Re: UK Speed Limits - Editing Guidelines and Tips

Post by Challenger3802
Well hello and welcome to the forums. Always good to have another editor making waze better for everyone.

Ian
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