[OSM-talk] Highway=trunk : harmonization between countries ?

Marc Gemis marc.gemis at gmail.com
Tue Aug 22 11:33:26 UTC 2017

Did you try with e.g. MapFactor Navigator, which has settings for your
preference of 8 road categories + maxspeed inside & outside towns ?
Just being curious.



On Tue, Aug 22, 2017 at 1:13 PM, Lester Caine <lester at lsces.co.uk> wrote:
> On 22/08/17 11:41, Colin Smale wrote:
>> I agree,  classification should be largely irrelevant to routing.
>> Routing needs timings from node to node, which are best derived from
>> bendiness, number of lanes, junctions etc and then capped to the legal
>> maximum. A four-lane secondary, primary, trunk or motorway will all have
>> the same effective speed in the absence of bends and junctions.
> The problem here is that most routing systems use the highway= tag as
> the initial key to defining the 'defaults' for a link and the delay
> elements added moving from one type of road to another. I am convinced
> there is a problem with the tagging of the B4632 which is preventing it
> from being seen as an alternative to the A46 10 mile detour but as yet
> I've not spotted anything wrong. Shortest routing will pick it up, but
> then avoids the M40/M6 for the next stage :( It's not just OSM routing
> that gives problems, other routing engines are showing similar detours
> around local 'shortcuts' ... so even within a single country
> harmonization is a problem ...
> --
> Lester Caine - G8HFL
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