Overall I think it's a great idea.

Could you filter out ways that have lanes:forward and lanes:backward?
eg. https://maproulette.org/mr3/challenge/3375/task/6686753 which
shouldn't need a redundant lanes tag as you can just add them up.
On Fri, 7 Dec 2018 at 10:49, Martijn van Exel <m...@rtijn.org> wrote:
>
> Hi folks.
> I created MapRoulette challenge asking mappers to look at aerial images and 
> add lane tags to major roads.
> https://maproulette.org/mr3/browse/challenges/3375
> This particular one is for NSW but can easily be ‘cloned’ for other regions.
> I wanted to get your opinion on this — good / bad idea? Can it be improved? 
> Smaller regions? Any feedback welcome.
> Martijn
>
> PS the Overpass Query this is based on is:
>
> [timeout:190];
> area[name="New South Wales"]->.a;
> way[highway~"motorway|trunk|primary"][!lanes](area.a);
> out body geom qt;
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> Talk-au@openstreetmap.org
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