Door Zone

Area on either side of parked cars where one would make contact if a vehicle's door were suddenly opened resulting in one getting doored. Usually extends about 4-5 feet from the car, depending on door length.

Cyclists are advised to avoid these zones especially when bike lanes are placed in them referred to as Door Zone Bike Lanes.

Reference
Zone refers to an area, in this case the area surrounding a vehicle.

Forum Introduction

 * Ticketed! http://bikearlingtonforum.com/showthread.php?p=829#post829

Links

 * "Door Zone" - Wikipedia https://en.wikipedia.org/wiki/Door_zone
 * "Legally Speaking with Bob Mionske: The door zone" - VeloNews http://velonews.competitor.com/2015/04/news/road/legally-speaking-the-door-zone_366769