California → Arizona · Interstate 5 (San Diego Freeway)
Before turning the key for Tucson, Arizona, out of San Diego, California, run through the pre-trip checklist: registration card in the glovebox, current insurance card on your phone, working SunPass or E-ZPass transponder for the electronic toll plazas along Interstate 5 (San Diego Freeway), and a printed backup of the destination address in case GPS reception drops. The locked itinerary measures 688 km (428 miles) with an optimistic estimate of 6h 33m if cruise control sits steadily within the posted limit. Pulling out of San Diego, the southern California port city on the Mexican border, the road eventually delivers you to Tucson, the second-largest city in Arizona and gateway to the Sonoran Desert. Schedule departure outside the morning rush window and pack a thermos of coffee to skip an unscheduled stop in the first hundred miles. Budget around $57.50 just for the pump (62.5 liters / 16.5 gallons of regular unleaded) plus headroom for tolls. Outbound reimbursement at $0.43/km equals $295.84 cleared to the driver. Use the Clara generator the moment you park to wrap everything into a single digitally signed PDF.