Oregon: It is illegal to leave car doors open for longer than necessary [quote]§ 811.490¹ Improper opening or leaving open of vehicle door • penalty (1) A person commits the offense of improper opening or leaving open a vehicle door if the person does any of the following: (a) Opens any door of a vehicle unless and until it is reasonably safe to do so and it can be done without interference with the movement of traffic, or with pedestrians and bicycles on sidewalks or shoulders. (b) Leaves a door open on the side of a vehicle available to traffic, or to pedestrians or bicycles on sidewalks or shoulders for a period of time longer than necessary to load or unload passengers. (2) The offense described in this section, improper opening or leaving open a vehicle door, is a Class D traffic violation. [1983 c.338 §655; 1985 c.16 §320] [/quote]