UK Speed Limits - Editing Guidelines and Tips

Some of the roads in Norwich have the wrong speed limit set.

Depends how bad your OCD is, I drive down several roads where the speed limit is not verified (and wrong) and it bugs the life out of me, hence me updating as many as I can… lol

I did set some speed limits in Norwich but I was going by Streetview which can be a couple of years out of date. I have even left a Note on B1108 - Watton Rd where the 2015 Streetview at the Junction of the A47 shows a 50mph speed limit. But as you go down Watton Road it changes to the 2012 streetview which shows National Speed Limit.

So it needs either a local person or an editor to visit to set it as I could not see enough evidence to see where the 50mph limit finishes. :wink:

I live in Costessey and it is quite annoying when trying to plan routes and the timings are thrown out due to incorrect speed limits. The majority of the roads that make up the ring road are actually 40mph zones. @hublander I have driven the B1108 several times as my Aunt lives in Hingham and the majority of it is now 50mph although I would have check to find the exact change points.

Are speed limits now factored into routing times?

Sent from my iPhone using Tapatalk

I don’t think the routing engine has been changed, so I suspect speed limits are purely so that the app can warn the driver when speeding.
I think they are worth putting in for this reason alone, and would encourage theC3lt and others to edit the map where they are missing/wrong.

Ian

I think the unverified speed limits were derived from the speeds seen by the routing engine.

I would also hazard a guess that Waze is only interested in speed so not to pollute the routing times where people have chosen to exceed the speed limit.

Putting that together I would make the assumption that Waze is using the speed limits in the routing algorithm to prevent underestimation of drive time, encouraging people to drive a bit faster than they should be.
I know quite a few people that like to play ‘beat the satnav’ and some will drive too fast in some scenarios just to prove it wrong…

Just my POV not necessarily fact, but I don’t mind being proven incorrect :slight_smile:

That is what I wish they would do, but unfortunately this is not the case, despite a direct request. I shall petition them again…

Maybe they are waiting till they get enough of the countries using speed limits, if not then IMO it would be foolish not to be using it.
You would have a +1 from me for it!

Please petition them again! It would certainly make some roads here give a more accurate eta.

I came across a roundabout today with a waze speed estimate of 97mph, all connecting roads had a speed of 19mph or 47mph…

Go figure, I did screen grab it but forgot to mail them to myself before I logged out :frowning:

Sent from my iPhone using Tapatalk

Here’s a small bit of feedback from one of our top professional drivers:
It’s rather annoying when the speedlimits have been lazily set at the nearest junction instead of the exact location.

If the speedlimit sign is within (say) 5 metres of an existing junction, then that’s fine to not split that segment, as GPS isn’t much more accurate than that anyway. But for larger distances it is desirable to have accurate mapping of the real world…

At 30 mph, a car travels 17 metres in 1 second. Or, to turn it around, every 17 metres of inaccuracy in placement adds 1 second delay in the app. Obviously it’s double that amount at 60. So, we could maybe stretch that 5 metre limit to 10?

Sent from my Wileyfox Swift using Tapatalk

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

After all, shouldn’t the Wazer be looking out that big window thing for the big round things with red borders :twisted:

I have also noticed lazy speed limit setting but when I was doing it exactly got moaned at by higher editors saying that it did not matter if the speed change is within 5 metres of junction. Most people don’t realise I have been using a Tom Tom for over 10 years and I know of the Sat Nav lag. The sat nav at high speed is reporting where you was, about 2 seconds ago. Then i also know from Geocaching that public GPS accuracy is about 20ft.

So even if a speed limit is set in the right place there can still be a delay on it coming up in waze. So the good thing with speeds available on the beta is that I can check I have them right.[emoji2]

Sent from my GT-I9505 using Tapatalk

Also I was wondering is there an update to the heat map so we can see how things are progressing. It will let me know where to drive to see what the Speed Limits are. :wink:

Stats and heatmap updated in the second post.

Is there any way of zooming in on the heat map (and in particular for Kent :wink: ) as I’d quite like to know which roads in my area need attention?

Many thanks,
Ian

If you use the WME Color Speeds plugin, you’re able to highlight those roads with/without speed limits , control the zoom levels they appear and the classification of the road.

You can find the plugin here.

The WME Colour Highlights extension also shows which segments do not have verified speed limits.

Some more statistics for you:

The following 53 counties have speed limits on more than 70% of their Motorways and A Roads (i.e. Freeways, Major Highways and Minor Highways). Well done to everyone who contributed! :slight_smile:

Lincolnshire, Leeds, Down, West Sussex, Wiltshire, Surrey, Hampshire, Shropshire, Antrim, Essex, Bradford, Londonderry, Tyrone, Belfast, Pembrokeshire, Dudley, Armagh, Nottingham, Fermanagh, Coventry, Conwy, Milton Keynes, Derby, Gateshead, Peterborough, Cardiff, York, Brighton And Hove, North Lincolnshire, Newcastle Upon Tyne, North East Lincolnshire, Telford And Wrekin, West Berkshire, Portsmouth, Wrexham, Southend-on-sea, Thurrock, Neath Port Talbot, Swindon, Bournemouth, Southampton, Newport, Isle Of Anglesey, Reading, Wokingham, Falkirk, Bracknell Forest, Windsor And Maidenhead, Medway, East Renfrewshire, Bridgend, Vale Of Glamorgan

These 18 counties have more than 50% (but less than 70%) - just a little more work needed:

Greater London, North Yorkshire, Kent, Cumbria, Nottinghamshire, Worcestershire, Cambridgeshire, Hertfordshire, East Riding Of Yorkshire, Somerset, Buckinghamshire, Oxfordshire, Gwynedd, Monmouthshire, North Somerset, Blackpool, North Tyneside, Torfaen

Thanks for the update, it is useful to understand how this is going. It was difficult from the heat map to estimate the percentage complete. I guess the discussion about the definition of “county” is for another time. :smiley:

2 questions, Would I be right is assuming any county not mentioned is below the 50% mark, as there are a lot missing from your list? :?

Is the 70% target for each county or is it an average over the whole of the country (whole of the UK?), I guess what I am asking is do we stop in the ones that have reached 70% and concentrate on the others, or will one county at 90% offset others below 70%?