CN sure doesn't like visitors in their yards. I've seen all these signs on CN property separately before, but there sure is strength in numbers. This isn't the main entrance either, just a dirt road in the middle of nowhere, on the city's outskirts leading to the shops (CN's private road runs all the way along the yard). Oddly this signage does not seem to work, at least one trespasser went through while I was filming.
CN purists will note the inaccuracy of the remote loco sign. CN 7271, GP9RM, like his 7200 series brothers is indeed a remote unit, usually working with a slug. However he was re-built from a high-hood GP9 in 1993, when the CN NA scheme was in place, thus he never wore the zebra paint! Even if he was re-built prior, he would most likely wear the switcher paint, once again no zebra!