[Tagging] Dispute prevention: meaning of lanes tag

[Andrew Errington]

I'm quite happy with lanes=n where n is an integer.

I am very happy to assume that a one-way road without lanes=* has only one 
lane.

I am also happy to assume that a not-one-way road without lanes=* has two 
lanes (one in each direction).

I am extremely happy to see a width=* tag that I can use in conjunction with 
the lane count (even if the lane count is assumed).  It tells me the width of 
each lane.

A lane count of 1.5 is very confusing.  What does it mean?  What is the width 
of each lane?  Is it really 1.5?  Should it be 1.55, or 1.4, or 1.6?  It's 
more useful to tell me width of the road.  Then, if there is one lane I can 
see maybe it's very wide, or if two lanes I can see maybe they are very 
narrow.  It's okay to let me assume the number of lanes because the 
assumption is safe, and if it's really wrong then someone will tag it 
properly later.

In summary, I think simpler is better.  A non-integer lane count is useless.  
Use the width tag.

Best wishes,

Andrew