I remember something about the car on the head pin needing to have a toilet for the engineer. Most runs are short, but this might fulfill the FRA toilet rules.
The noses of the F40s had the cab signal equipment.
note: My post is what I remember 15 years ago. It is also what was done on BNSF. Burlington trains are operated and maintained by BNSF. Their policies may vary from that of Metra operated routes.