Nice black and white rendering in very contrasty lighting. Not sure it shouts trains, planes, or airplanes - but it does whisper it. Don't think the thin white line in the border adds anything.
Is a construction vehicle really considered an automobile? I mean, you would never see that rolling down the street. Also, need a tad bit more practice on the Dodging/Burning, as I can see the spots in which you attempted to fix the photo. 5
ignoring the fact that i don't really see this being a P,T, or A (it's not even transport really, more plant) i would consider this a really decent shot. considering you've chosen a diggers less interesting end (its bum) you've managed to give it a certain degree of style, probably helped with the correct decision to be B&W. However, the top of the cab looks a bit odd (band of darkness) and i think you might've cropped just a bit too much off the right. still, nice photo. 7.