Moving people and goods around a country as big as ours requires a lot of power and mass. Most of us have spent time driving on the highway and are familiar with the scene of huge semis and trailers hauling lumber, food products, and merchandise to and from destinations, or the convoy of recreational vehicles on their way to the next city, lake, or campground. These vehicles are massive! They take a lot to get moving and once they are, they can cruise. But that also means they take a lot to slow down and stop.