Mobility 21 Summit Competitive California 2015 Summit Come join Mobility 21 as they define transportation’s role in making California the best place to live, work and play. Mobility 21 is a coalition that brings together public, business and community stakeholders to pursue regional solutions to the transportation challenges facing Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego and Ventura counties. A nonpartisan alliance, Mobility 21 delivers a unified voice for the region’s transportation priorities and seeks to improve mobility in the region.