I-8 is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System from I-5 to the western junction of SR 98, though it is not an official state scenic highway. It is officially known as the Border Friendship Route from San Diego to the Arizona state line. The Interstate is signed as the Ocean Beach Freeway west of I-5. For the entire length within San Diego County and into Imperial County, it is signed as the Kumeyaay Highway, after the local Native American tribe and their traditional trade route which the Interstate follows. Between Old Town and El Cajon, I-8 is called the Mission Valley Freeway. In 2014, I-8 had an annual average daily traffic (AADT) of 11,800 vehicles between Bonds Corner Road and SR 115, as well as between SR 98 and Imperial Highway, and 239,000 vehicles between I-805 and I-15, the latter of which was the highest AADT for the highway in California.