Those remind me of the old Trail 90s and the like... cool.
Wish we used those here... never happen though. The US postal service is a law unto themselves... they've been around longer than Washington (well anyway) and they know it.... postal vehicles never show a license plate or any sort of ID number....everything else has a plate of some sort even if it's just a federal "GS" plate but not the post. Heck, you see more license plates on military vehicles! Smart drivers know to stay the *#&$ out of the way of postal delivery vehicles 'cause they'll only stop for an accident if it injures them.