The main avenue in Chuy, Uruguay, and Chuí, Brazil is the border between the two countries. Also, the avenue is called Uruguay Av. in Brazilian side and Brasil Av. in Uruguayan side.

Chuy – Travel guide at Wikivoyage

Does Uruguay have a lot of cultural influence from Brazil? - Quora

What does the border between Brazil and Uruguay look like? - Quora

Crossing The Border Between Brazil and Uruguay.

Guide To Chuy / Chui

What does the border between Brazil and Uruguay look like? - Quora

Chuí, Rio Grande do Sul, and Chuy, Uruguay, are two cities divided

Crossing Borders Uruguay to Brazil — ALONG DUSTY ROADS

Guide To Chuy / Chui

A Night in “Fucking Chuí” Between Uruguay and Brazil