|oneway = alternating|
|Oneway that changes its direction often|
|Used on these elements|
|Tools for this tag|
This tag is used for roads that alternate between different directions regularly and often. Its main usage is on narrow bridges or at road construction sites. Often there are traffic lights at both ends regulating traffic flow.
This tag is only used for roads that change direction often (usually several times per hour) and regularly. Use oneway=reversible and Conditional restrictions as needed for roads that only change direction at specified times. If you are not sure whether to use oneway=reversible or oneway=alternating, ask yourself: When I need to use this road but traffic is traveling in the opposite direction, would I wait for the direction to change to enter the road (oneway=alternating) or would I use a different route (oneway=reversible)?
For short stretches of narrow road (bridges, underpasses, etc.) without traffic regulation, the tag priority=* might be better.
Routing engines are encouraged to route over this type of oneway independent of direction but use a heavy penalty when calculating the travel time to allow for possible waiting times.