[OSM-talk] How to use lanes= for two way single track roads?

[Robin Paulson]

On 13/03/2008, Paul Hurley <paul at paulhurley.co.uk> wrote:
>  According to map features the value for the lanes key should be.
>
> "Number of travel lanes in each (or only permitted) direction"
>
> I've been tagging to this definition.
>
> "Number of travel lanes on the way"
>
> This makes more sense to me because you can tag two way single lane
> roads with lanes = 1. The map features definition on the other hand
> doesn't give an obvious way to tag these roads. lanes = 0.5 perhaps.
>
>
>  It also runs into trouble with 3- and 5-lane roads. Tagging the total
> number of lanes makes a lot more sense to me. (per carriageway if
> applicable, since each should be mapped separately)
>
>
>  I have recently posted a similar question to the newbies list.  There are
> two roads I've mapped recently where a short section has a width restriction
> meaning cars can only pass in one direction at a time, and I don't know how
> to map it.  If lanes is the total lanes for a way this would work, but how
> does osmarender render this ?

maybe we're missing the point here - OS and others use a completely
different designation for roads like this - 'less than 4m wide'. maybe
we should add a new highway type, that would remove the necessity to
define numbers of lanes for these roads?