:smack:
Ignorance well fought. Thanks! 
Drayage usually means the short-distance conveyance of a container. In the Chicago region it’s used a lot for interchanging containers. The rail network is congested and—by definition—one-dimensional, so it’s often much faster to take the container off at one intermodal yard, drop it on a chassis, and drive it a few miles to the other railroad’s intermodal yard where it’s loaded onto a double-stack train and headed out for the container’s destination. A fair proportion of the truck traffic on some Chicago roadways is drayage.