[Tagging] Merge cycleway=asl/advanced_stop_line/bike_box/...?

Andrew Chadwick (lists) a.t.chadwick+lists at gmail.com
Tue May 22 12:50:24 BST 2012

On 22/05/12 12:17, fly wrote:
> Please, go ahead. ASL get more common in Germany, too. Only problem I
> have: Where to place the tag. The best is probably an own node though
> you loosing references to the intersection/traffic_signal.

Oneways are easy. Two-way situations like

  = http://www.openstreetmap.org/browse/node/1239065241

are awkward to interpret. It's intended for westbound traffic turning
onto the major road, not eastbound traffic turning onto the residential

In this case however, you just need to look for the nearest traffic
signals node to figure out which is the correct orientation for the ASL.
It can't be done by simple junction proximity in this case, however
routers using ASL nodes could discard ASLs encountered within short
distances of traffic light intersections in directions facing away from
the traffic lights.

Major-onto-minor road intersection could be another way of managing
routing discards for particular directions. The ASL faces in the
direction of the most major intersection node if there are two adjacent
candidate intersections. Feels intuitive, but fragile :/

(Having a highway=stop node positioned behind the cycleway=<x>stop
actually makes things easier for both when interpreting direction. The
clue is in the "advanced" :-)

Andrew Chadwick

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