[Talk-GB] Cycle lane in one direction only

[Ed Loach]

> Can't we use the direction of the way being tagged? E.g.
> cycleway:withway=<any permissible value for cycleway>
> cycleway:againstway=<any permissible value for cycleway>

What is it we are trying to address here exactly? I'm assuming it is
cyclelanes that are part of the road/way as if they are separate
then they should be added as a separate cycleway (which may or may
not be oneway).

Assuming that we are trying to tag cyclelanes marked as lanes on
roads, then we need to consider whether we can safely assume that
cycle lanes drawn on the left of a road (in UK) will always be in
the same direction as the traffic flow.

If this isn't a safe assumption, then we might need to consider a
scheme which indicates both which side of the way a cyclelane is,
and which direction cyclists will be travelling relative to the
direction of the way (with/against or both).

So if we assume we have a directional way (as per oneway=yes, but in
this case not a oneway way), then we could have cycleway:left to
indicate that the cycle lane(s) are only on the left of the road.
But we may need to specify that the cycleway direction is opposite
to the traffic flow, same as traffic flow or two way.

Two examples. Botley Road in Oxford has cyclelanes (part on road and
part on pavement) on each side of the road in the same direction as
travel as the cars on the road. Centenary Way in Clacton though has
what I will (when I get around to tracking it) draw as a separate
cycleway as there is some grass verge between it and the road (and
shared pedestrian use), but this is only on one side of the road and
is two way. If there were no verge I'd probably want to try and use
some sort of suitable tagging of the way.

Perhaps not the best of examples, but I'm trying to show that we may
need to indicate which side of the road cyclelanes are as well as
which direction you can travel on them.

Ed