I think that we usually chose the right way to travel thinking about the speed and distance. It is because when we need to go somewhere near, like the convenience store near your house, we usually walk. We think about the time it would take to go and back so that you will have a estimate of how much time it will take. Also this unit made me think about the speed of when we travel a lot. We measured our own walking speed, and we compared it to others. I thought that we all walk slower, because in my opinion, when we write it down, eg. 1.5m/s it looks faster than it actually is. In today’s world, I think we have lots of choices how transportation, and we chose the right choice thinking about the speed. I think it is better that way than just choosing the fastest vehicle to go anywhere, and think about the time it would take to get to our destination.