
Western & Central USA on a double-sided indexed map with coverage extending westwards from Lake Michigan & the eastern boundaries of Illinois & Mississippi. State borders are prominently marked. Road network stresses the interstate highways, showing interchanges with their numbers. Numbering for state highways & smaller roads is also very clearly presented. Driving distances are shown on main routes. Topography is indicated by colouring for national/state parks & other protected areas. Also marked are Indian Reservation areas & restricted entry military zones. Latitude & longitude lines are drawn at 1