I only really like number 3 (the others don't do much for me compositionally). The exposure is good, and you have leading lines toward the subject. However, the angle is a little off, and could do with a little cropping and rotation. That, and when photographing tracks like this, symmetry is usually a big part of the composition, so take care to position the camera dead centre between the tracks. It looks like you shot a smidge to the right, so the tracks look like they're going left. That and the subject is off-centre.