Personally it’s crossing the freeway where I live. My city has about 100,000 people but only six roads cross the freeway, with three more wayyy on the outskirts that are basically detours. There are also only a few pedestrian bridges that cross it, and zero pedestrian tunnels. The way our freeway works is it goes around downtown with the ocean to the south and west, so people live on the outside of the freeway and then commute inwards. This means insane bottlenecks with miles of cars in both directions trying to get to the other side. It doesn’t help that our four freeway entrances are also at some of these tunnels / bridges, which means people who need to get on or off the freeway are also present. In general it’s a shitshow and I’d really like to see a few more bypasses to prevent this congestion in the future.
They built the interstate on the west side of town, so all the pollution blows into town. They built a pork processing plant on the west side of the interstate, so all of the smell blows over the interstate and into town. The main road through town is a state highway with 2 east and two west lanes plus a split turn lane. It goes directly past the high school and near some other schools. Most of the pork trucks come from the east and have to travel all the way through town. There’s also two roads that travel north/south that are 2/2 with turn lane, the intersections with the state highway have a lot of accidents. Old downtown is several blocks away from any main road, so nobody goes to any business near them. They have started to focus all development near the interstate, and are trying to get developers to build near the highway, by the pork plant. It’s 18 levels of pure stupidity.