Evangelion: 3.0+1.0: Thrice Upon A Time Poster Meaning

The place in  the poster is Ubeshinkawa Station. Hideaki Anno was born in Ube, Yamaguchi.

From top:
Ikari Shinji
↓
Divergent →Television ver. Neon Genesis Evangelion
↓
Divergent → Old Movie
↓
Shin Evangelion Movie:||
Ubeshinkawa Station. The kanji for this is 宇部新川駅. The (Shin) can be replaced with 宇部(シン)川駅 like in the series title.

＜Roles＞
Ikari Shinji: Train's passenger
Nagisa Kaworu: Train's driver
Divergent: Crossroad to different story
Main line: Path to Shin Evangelion

Evangelion series has been said to have time travel, timeslip. Assuming with train's railway not time axis concept, it fits with the poster.
As for Nagisa Kaworu role as the train's driver, that's why he can said something like 「See you」, 「You can start over」.

Source