Arizona → Texas · Interstate 10 / Interstate 19
Before turning the key for El Paso, Texas, on the homeward run from Tucson, Arizona, do a quick inventory sweep of onboard equipment: proposal binder, undelivered promotional items, and visitor badge should each go into a separate compartment so nothing slides into the footwell during a sharp brake. Interstate 10 / Interstate 19 accepts the 503 km (313 miles) of the return in roughly 4h 47m. Pulling out of Tucson (the second-largest city in Arizona and gateway to the Sonoran Desert), the road eventually puts the driver back in front of the urban skyline of El Paso (the far-west Texas border city across from Ciudad Juárez and a major Sun Belt logistics hub). Refueling sits near $42.04 for the same 45.7 liters (12.1 gallons) at the EIA national average benchmark. Return reimbursement, calculated against $0.43/km, returns $216.29 into the driver's wallet. Snap the closing odometer with the phone camera and attach it directly to the Clara receipt — internal controls accept photographic evidence without a supplementary spreadsheet.