The Ambassador Bridge, according to wikipedia, is the busiest International crossing in North America. It was built in 1929 and the ramps on both the U.S. side and the Canadian side have had work over the years. It is 152 feet above the Detroit river, and due to SC4 limitations, I couldn't make it's exact slight diagonal path. The way my tiles are set up in my region though made for a nice, creative solution. On the U.S. side, it connects with I-75 and I-96, with new ramps most recently done this year, as all semi trucks used to have to drive on Fort Street, to the closest I-75 entrance ramp. All traffic on the Canadian side is thrown onto Huron Church road, which you have to drive through Windsor's surface streets to get to highway 401, the Mac Donald Carter Freeway.
Now for a history lesson, if you're interested:
This bridge is vital to the region as around 150,000 jobs depend on the bridge. Back in the good old railroad days, Detroit and Windsor were major railroad hubs. A rail tunnel was built under the Detroit River. Most of the train traffic was from Chicago, and as they were heading east to the Atlantic Seaboard, they stopped in Detroit before crossing the river, only one of the factors that made Detroit a huge city. A bridge was in high demand, and after more then 10 years of important people arguing, yelling, and spitting in each others faces, it was built in 1927, and completed in 1929. A very complicated situation / plan is trying to be drawn up for a new bridge to be built, and possibly connect directly from Canada's 401 freeway to I-75 / I-94, so it can bypass Windsor's surface streets.
Another update: I have 2 tiles of Detroit city filled out with streets, as well as 1 of Windsor! Detroit should take 11 or 12 more large tiles and Windsor, or any sort of large urban development in Canada, should be 7 more tiles. I'm debating myself on to start building Detroit and Windsor now, or wait until I develop the entire cities first. Hmmmmmmmmmmm..............
The attachments include the US border patrol, the toll booths on the Canadian side, and a grand 400 some ft. aerial view of the bridge.