From general alerts...

Montage of anti dooring graphics from around the world up to 2016. Note that but for the Dutch Reach drawing in upper right - all suggest caution or safe distance rather than the obviously safer Dutch far hand method to reach, swivel & look back directly for on-coming cyclists & vehicles before opening & exiting.
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Montage of Dutch Reach anti dooring graphics. One year on, far hand method imagery is now a vital part of international anti-dooring activism.