Within the 100 square mile border region there are many overseas Chinese who pass through Mexican customs in the morning on their way to work. In the evening their cars thread their way back through U.S. customs as they return to their homes in the States.
正因為美墨邊境一百公里範圍內，人來人往尚稱方便，於是白天通過墨國海關前往墨市上班，傍晚則夾在長長的車陣中，通過美國海關，回到墨市對岸的美國加力西哥市居住的老僑，為數不少。