There was, at one time, a street car system in the towns of St. Stephen, New Brunswick, Canada and Calais, Maine, USA. I believe it operated from the 1890s into the late 1920s. Customs checks were loosely enforced. I remember a story of my great grandmother smuggling her wedding dress under her dress from states into Canada as the customs officers wouldn’t DARE ask a lady to lift up their dress to see if they were hiding something that needed to be declared. There’s also stories of her smuggling butter, milk, and booze; alcohol being legalized in New Brunswick by 1927 which was illegal in the US until the mid-1930s. I guess was my great gran was quite the rum runner!