- - Contents Transportation Strategies Peak Season: Buy the Lowest Cost Fuel and Use the Preferred Fueling Network The United States Postal Service® (USPS®) is emphasizing the need for all employees to pur..." /> - - Contents Transportation Strategies Peak Season: Buy the Lowest Cost Fuel and Use the Preferred Fueling Network The United States Postal Service® (USPS®) is emphasizing the need for all employees to pur..." />