The phrase "adjacent doors" is correct and usable in written English.
It can be used to describe doors that are next to each other or in close proximity.
Example: "The fire escape is located between the adjacent doors of the two offices."
Alternatives: "neighboring doors" or "contiguous doors".
Indeed, in these cases, passengers tend to modify the selected door (choosing adjacent doors and/or adjacent coaches) as a function of the crowding degree in order to board as soon as possible.
When in front of a door there is a larger group of passengers than a set value (which, obviously, varies from case to case), they start moving to the adjacent doors in the same coach.
Two adjacent doors will automatically orientate to become double doors.
The adjacent door was ajar, its frame twisted.
Suddenly the adjacent door opened — it was Ms. Montgomery's sister, Angela.
Unable to face him he turned through an adjacent door to discover himself in a broom cupboard.
In a hallway outside of an interview room, Williams slipped inside of a vestibule, where she went unnoticed as Lisa Raymond exited an adjacent door and walked past her.
A handwritten sign taped to the front door says that the library is closed, and directs people who have come to return books toward a mail slot in an adjacent door.
In another, the animals were placed in front of a clear acrylic box with two small swinging doors that opened only toward the inside; a piece of food was placed on one of two small shelves behind the doors, so that it would fall off if the subject tried to get it via the direct route rather than reaching around through the adjacent door.
When a student approached the doors, the researcher either stepped ahead and opened the door for them, or fell into line with them and reached for the adjacent door so that the two doors opened at the same time.
Thoroughly clean and dry the hinge and any adjacent door surfaces.
