[Tagging] Counterflow Lanes

Paul Norman penorman at mac.com
Sun Feb 20 00:24:51 GMT 2011

The Massey Tunnel is currently tagged with oneway=no on the reversible
section and through the tunnel itself. 

For the reversible sections (that lead up to the tunnel) they really
alternate between oneway=-1, oneway=yes and access=no. For the two parallel
tunnels themselves they alternate between oneway=yes and oneway=no.

I'm not sure what the solution is, but oneway=reversible isn't a special
case of oneway=yes so it would break existing data consumers.

-----Original Message-----
From: Nathan Edgars II [mailto:neroute2 at gmail.com] 
Sent: Saturday, February 19, 2011 1:54 PM
To: tagging at openstreetmap.org
Subject: Re: [Tagging] Counterflow Lanes

On 2/19/2011 4:33 PM, Paul Johnson wrote:
> A better example would be the George Massey Tunnel on 99, which omits 
> the oneway= tag completely on both motorways in the contraflow sections.

According to the wiki, highway=motorway* implies oneway=yes (meaning it's
always oneway in the drawn direction), so you'd need a oneway tag to
override this. But oneway=no is incorrect; oneway=reversible is a reasonable
replacement when it's sometimes oneway=yes, sometimes oneway=-1, and maybe
sometimes oneway=no. Other tags could then be used to indicate when it's
oneway in which direction (if the times are fixed).

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