[OSM-talk] Removing redundant routing instructions

[Rob Nickerson]

Hi all,

In the UK (particularly in rural areas) it is common to find a road that
turns 90 degrees to the left or right without a junction (that is the road
just continues and white lines mark it as such). Meanwhile another road may
come in from the other side with a 'give way' style junction.

Although the road continues round the bend "SatNav" systems often think it
is a junction and tell you to "turn right/left in 100 yards/meters".

I wonder whether it is possible to indicate this in OpenStreetMap so that
routing engines can omit this redundant instruction.

== Example picture ==

https://drive.google.com/file/d/0B6J5ZA1hu93bZmx2NTIxaHdfMUE/view?usp=sharing

In the example Oban Road [1] turns to the right to become the northern
section of Sydnall Road. All main routers tell you to turn right. In my
opinion this is a redundant instruction (or could be better worded). I've
tried to add extra nodes so that the road naturally bends but the main
routing engines still tell you to "turn".

== Question ==

Could we benefit from a new route relation? For example a "route_continues"
relation? Would others find this useful?

Regards,
Rob

[1]
http://www.openstreetmap.org/directions?engine=osrm_car&route=52.45362%2C-1.48598%3B52.45341%2C-1.48944#map=18/52.45332/-1.48771&layers=Q
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