I-40 intersects with eight of the 10 primary north-south interstates (all except I-5 and I-45) and also with the major Interstate routes I-24, I-30, I-44, I-77, and I-81. Interstate 40, a major east-west route of the Interstate Highway System, has its western terminus in Barstow, California, United States. Source Link :- http://ready2beat.com/internet/i-40-road-conditions-and-traffic-reports