Traveling at well over 100 mph, an Acela Express sure covers a lot of ground in a 50th of a second! Captured here southbound (railroad west) a pan shot featuring Acela Express #2013 racing through Bristol Township, PA while en route to Philadelphia.
Pace and pan shots of trains from on the ground or in the air. If you're not in the locomotive cab or on-board the train, it's the next best thing to being there.