And congestion I find an interesting one. Where I live, the city planners are trying to make it as hard as possible for people driving into the city, the idea being that people will just give up if driving even to a parking lot close to the city center sucks too much. However, it has always made me wonder: doesn't this strategy add to the congestion? Like, what if you made it instead super easy and fast to get to a parking spot - then your car would be off the road much faster and you'd produce less congestion, less noise, and less pollution.