[Tagging] traffic lights

Nathan Edgars II neroute2 at gmail.com
Sat Sep 3 15:42:11 BST 2011

On 9/3/2011 10:30 AM, sergio sevillano wrote:
> El 03/09/2011, a las 12:10, Nathan Edgars II escribió:
>> On 9/3/2011 6:06 AM, Nathan Edgars II wrote:
>>> highway=traffic_signals means "this intersection is governed by traffic
>>> signals".
>>> If you want a tag for "there is a physical signal here", use a
>>> different one. Using highway=traffic_signals for this will lose
>>> important information about what intersections have signals (for
>>> example, a router can no longer say "turn left at the second signal").
>> Actually this is a bad example, since there are many reasons for having more than one traffic_signals node at an intersection. But when turning onto a trunk from a residential, for example, a router will want to put you out at a traffic signal, and this is much easier when the intersection node is clearly labeled.
> are we mapping reality or "for the router" ?

Both. Reality is that the intersection is controlled by traffic signals.

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