This. Phoenix highways have the best pavement quality. Good news is that post SB-1 Caltrans is using the same material in CA highways as well - rubberized aspha

This. Phoenix highways have the best pavement quality. Good news is that post SB-1 Caltrans is using the same material in CA highways as well - rubberized asphalt. I recently drove from SF to LA and sections of I-5 were recently repaved. Great ride quality