Comment by zephjc

Cars are also super space-wasters. They do nothing but sit for 80-90% of the time (which is one reason why car sharing is making more sense to people). In a lot of cities, especially newer ones built out since WW2, you will find a large percentage of space dedicated to parking lots. Not even necessarily parking structures (which cost a lot more per car) but just free to park flat lots, with nothing going on there.