why stop there? pretty much any form of transportation is more dangerous and/or generates more emissions that humans on their own two legs. collectively, we hav

why stop there? pretty much any form of transportation is more dangerous and/or generates more emissions that humans on their own two legs. collectively, we have decided to trade some of that away to actually get places in a reasonable amount of time. but if you don't feel comfortable driving in 65+ mph traffic, there are plenty of surface roads that run parallel to interstates.