Missouri → Indiana · Interstate 70 / Interstate 64
Before turning the key for Indianapolis, Indiana, on the homeward run from St. Louis, Missouri, 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 70 / Interstate 64 accepts the 437 km (272 miles) of the return in roughly 4h 10m. Pulling out of St. Louis (the historic Gateway to the West and a major Mississippi River freight port), the road eventually puts the driver back in front of the urban skyline of Indianapolis (the capital of Indiana and home of the Indianapolis 500 motor race). Refueling sits near $36.52 for the same 39.7 liters (10.5 gallons) at the EIA national average benchmark. Return reimbursement, calculated against $0.43/km, returns $187.91 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.