[Talk-us] Chesapeake Bay Bridge reversible lanes

[Alan Brown]

 Hi,
Haven't posted to this for nearly ten years, but I figured this may be the best place to get an answer to my question.
It's a question here about handling the Chesapeake Bay Bridge reversible lanes.
The Chesapeake Bay Bridge has two major part, one represented by https://www.openstreetmap.org/way/27164664, another by  https://www.openstreetmap.org/way/27164663.
Most of the lanes most of the time on the former side go in one direction, and  the lanes on the latter side go the other direction.
However - if we look at the tags on https://www.openstreetmap.org/way/27164664, we see the following:

| oneway | yes |


| lanes | 3 |
| lanes:both_ways | 1 |
| lanes:forward | 2 |


So one lane is reversible.
We see this here:  https://goo.gl/maps/72nEj58Qi8xiUsad6
The lane is separated from others with a double yellow line - so drivers, regardless of which direction they are going, should not enter or exit it.
Should this lane be digitized separately, tagged as reversible?  Even though it's the same bit of pavement, it would allow routing engines that do not have lane specific routing to handle this situation.  Or there another way to model this?  It seems to me that the lanes:both_way tag in combination with a oneway: yes tag would be very confusing to interpret; they seem to be at odds with each other.
While we're at it:
I know in the past highway: motorway and highway: motorway_link ways were to be interpreted as one-way in the direction of digitization if there was no oneway tag-value pair.  The latest documentation recommends marking two-way motorway_links with oneway=no.  However - currently - in the absence of any oneway tag, should we still assume it is oneway?  In the past, it was dangerous to, as the data was not fully attributed.   But we have found some two-way motorway_links that do not have oneway=no.  We can correct and tag these, but in the meantime, what should we do?
Thank you for any feedback,Alan 






 
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