Imperial County

• Imperial County Transportation Commission

Los Angeles County

• Arroyo Verdugo Communities Joint Powers Authority
• City of Los Angeles
• Gateway Cities Council of Governments
• Las Virgenes Malibu Council of Governments
• North Los Angeles County
• San Gabriel Valley Council of Governments
• Westside Cities Council of Governments
• South Bay Cities Council of Governments
• San Fernando Valley Council of Governments

Orange County

• Orange County Council of Governments

Riverside County

• Coachella Valley Association of Governments
• Western Riverside Council of Governments

San Bernardino County

• San Bernardino County Transportation Authority / San Bernardino Council of Governments

Ventura County

• Ventura Council of Governments