Tlaxcala → Morelos · Carretera Federal 117 Tlaxcala-Puebla
Coming back from Tlaxcala, Tlaxcala, to Cuernavaca, Morelos, the return leg also clocks roughly 140 km (87 miles) typically along Carretera Federal 117 Tlaxcala-Puebla, but the traffic picture shifts considerably compared with the outbound segment. Tlaxcala, the capital tlaxcalteca y la entidad más pequeña en superficie del país, fades behind the wheel while the vehicle pushes back toward Cuernavaca, the capital morelense conocida como "la ciudad de la eterna primavera", often after a full day of meetings, site visits, or prospecting calls. Plan 1h 33m plus a generous buffer against evening congestion, particularly on Fridays, holiday eves, or after major sporting events. Driver fatigue is the dominant concern returning home; mandatory rest breaks every two hours are non-negotiable. Fuel spend on the return stays near MXN 283.14 for 11.7 liters (3.1 gallons). The corresponding reimbursement on the way back reaches MXN 910.00 at MXN 6.50/km. Combine both legs on a single Clara receipt to document the full round-trip cleanly, with separate timestamps for transparent audit defense. For the US professional driving the 140 km (87 mi) between Tlaxcala and Cuernavaca, reimbursement of MXN 910.00 stays non-taxable to the employee when the employer follows an accountable plan under Treas. Reg. §1.62-2 and reimburses at or below the IRS standard mileage rate. US employers generally reimburse at the IRS standard mileage rate so the payment stays non-taxable to the employee under Pub. 463. Keep the IRS-compliant expense report (Form 1040 Schedule C, line 9) alongside the fuel receipt from any EIA-tracked retail station network pump used along the leg; Internal Revenue Service (IRS) examiners pull contemporaneous mileage logs first when auditing Schedule C unreimbursed business expenses, and the Tlaxcala→Cuernavaca corridor must show date, business purpose, and odometer readings.