[mkgmap-dev] routing and cycleway=track

Fri Jul 24 23:11:37 BST 2009

Hi Sven,

> > so that if the original way doesn't already have the bicycle routing
> > defined, it will be disallowed.
> 
> Ah, nice!

I have put out a new patch that does that.

> There is another thing I found looking at the code.
> 
> As far as left and right tags are concerned one should create a
> one-way cycleway only.
> 
> right: cycleway with oneway alongside the original way
> left: cycleway with oneway in opposite direction of the original way
> 
> *argh* while thinking about this it gets more complicated:
> 
> The side of the road where you need to drive will get important in
> this case! The above example is only valid for countries where you
> drive on the right :(

Most people do drive on the right, surely that's good enough!

> I did not find a tagging example where one-side cycleways are allowed
> to be used either way. I would suppose they should be tagged
> cycleway=track
> 
> To explain this (also a german rule). One-sided cycleways are usually
> permitted to be used in one direction only (the driving side) if the
> traffic signs are not explicitly positioned to be readable from both
> directions.

That's a subtlety that we can't really cope with.

> I conclude that this left/right stuff is flawed, this should rather
> be something like "direction" and "opposite direction" to make it
> independent from country specific driving directions.

Perhaps you should point that out to those who are proposing these new
tag values.

> Finally I think we should not consider these tags for now.

Well, the code will still recognise left/right/both as well as
track/lane and they all do the same thing. 

Cheers,

Mark