Business Loop I-10 - Pomona, Montclair and Ontario

This was formerly Business U.S. 70-99 and was signed as Business Loop I-10 in the 1960s along Holt Boulevard. The loop began at the Kellogg Interchange, the junction of Interstate 10, SR 57 (and former I-210) and SR71. Following Exit 42 B to southbound SR 71, the business route joined Holt Avenue from Exit 14 A across Pomona to Holt Boulevard and the city of Ontario. Shields still remained along this route in 2001 per correspondence with Ali Pezeshkpour on May 1, but only within the city of Pomona and not along the mainline of either I-10 or SR 71. The remainder of the route extended along Holt Boulevard from the city of Montclair to a wye interchange (Exit 55 A) with I-10 just north of Ontario International Airport (ONT).