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.
In my city, we are a very small town with a very unusual road layout. It is not pedestrian friendly, nor is it friendly to cyclists. The road isn’t really ever busy, but it’s two lanes each direction with a speed limit of 25 mph. Because the road is wide and has two lanes, people frequently go 40 mph, and it makes crossing the street harder. In my opinion I would like to see us go down to one lane each direction, and go to normal intersections rather than the weird slip lanes that we have