Incorrect Speed Limits

Mendedman

I have recently purchased a Start 52. I have installed the newest maps, but the speed limits for my home area are not up-to-date. I live in the London Borough of Lewisham. In September 2016 there was a borough wide 20mph speed limit introduced on all roads other than the Red Routes managed by Transport for London, and the main trunk roads. My Start 52 still has 30mph as the limit on these roads.

This means the speed warnings are wrong, and I wonder whether it would also effect the journey time calculations. Thoughts please.

Zsolt

They use the historical data (IQ Routes) information for journey times and not the signposted speed limits (or the incorrect ones in this case). These Lewisham speed changes were on the topic here for quite some time, so they could have fixed it already But other than the incorrect warning, it should have no affect on the journey time calculation.

MikkoK

Hi Mendedman,

Welcome to the Community!

I moved your topic to the Map Quality board where our Maps Specialist might be able to shed some more light on this. As for effect on routing, as Zsolt explained, routing is mainly done using the IQ Routes data rather than road speeds. For more about IQ Routes, please see here. The following video explains you more about how we do routing.
[video]

Cheers, Mikko

BrianE

Sounds good in theory, but I wouldn't call being routed along single-track country roads, full of potholes, covered in mud and with no passing places a stress-free experience as suggested in the video above.

jldiablo

BrianE wrote:

Sounds good in theory, but I wouldn't call being routed along single-track country roads, full of potholes, covered in mud and with no passing places a stress-free experience as suggested in the video above.

haha, so true... every single time when there is problem on the main road.. Now I would think twice before taking the suggested "green" route..

Steam106

Hi all, I'm sure this question has been asked before ( first time to these groups). Forgive me if I'm not looking in the correct spot. Speeds in my local area are not correct how can I get these corrected by Tom Tom, there are at least five local roads that Tom Tom says are 50km and they have always been 60km. A couple that they say are 50km then turn to 60 but have always been 60 and are clearly marked by sinage as 60.  I use these every day to drop my kids off at school and go to shops. How do I get these corrected?????????

John-Jay

Hi, @Steam106,

In theory, you need to report such changes via https://www.tomtom.com/mapshare/tools/ .

However, based on my experience, DON'T expect any dramatic results! The last time that I posted a Speed Limit Error/Change, it was still "Pending" after 12 months. Even when finally accepted it can take over 6 months for the change to be incorporated into a Map!

>:) >:)