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Texas → Texas · Interstate 45 (Gulf Freeway)
Before turning the key for San Antonio, Texas, out of Houston, Texas, 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 45 (Gulf Freeway), and a printed backup of the destination address in case GPS reception drops. The locked itinerary measures 359 km (223 miles) with an optimistic estimate of 3h 25m if cruise control sits steadily within the posted limit. Pulling out of Houston, the fourth-largest US city and energy capital of the world, the road eventually delivers you to San Antonio, the home of the Alamo and seventh-largest US city. 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 $29.99 just for the pump (32.6 liters / 8.6 gallons of regular unleaded) plus headroom for tolls. Outbound reimbursement at $0.43/km equals $154.37 cleared to the driver. Use the Clara generator the moment you park to wrap everything into a single digitally signed PDF.