That all depends on what list you are looking at Lanzate. On the particle air pollution list Lancaster is 24th and SD is not on the list.
http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=50752The fact that Lancaster metro, given its smaller size, is on the list one can conclude you have
many cars stuck in traffic.
Much of the reason non-industrial SD is on the lists is due to the big big city just to the North and the city to the South that is in Mexico. Which has less pollution regulation.
The Lincoln Highway was the first paved road in the United States between Lancaster and Philadelphia. It is 2007 and you still have no limited access road directly to the big city to the east sort of proves my point of built-in provincialism.
Actually the real proponent of building highways was Dwight Eisenhower. He saw how long it took him to go from washington to San Francisco right after WWI. When he became President he pushed through the Interstate Highways system in the Cold War because the US should have a way to transport tanks back and forth on our mainland. This highway system tranformed and unified the United States in many ways. Eisenhower is from Kansas so I guess the highway (or road building) is a Kansas idea Lanzate.
What would be better for the Northeastern Lancaster corridor Lanzate? A monorail? A bunch of buses? How about a high speed commuter rail line running from Lancaster to New Holland? Lets be creative.