today, railroads are primarily used to haul bulk quantities of cargo over long distances. unless a manufacturing or distribution facility has a direct connection to the railroad, the remainder of the trip must be handled by truck. recent implementation of "just in time" strategies have resulted in the increased use of trucks to help satisfy businesses' fluid inventory needs. using this strategy, businesses gain the ability to reduce the costs associated with excess inventory and larger warehousing facilities by requiring more frequent deliveries. according to an industry group, many retail, commercial, and government services require daily or weekly deliveries to keep supplies or merchandise on hand. many hospitals have also moved to "just in time" inventory systems. the nation's busiest gas stations require deliveries of fuel several times per day, while the average station receives fuel every two to three days. grocery stores require deliveries of perishable food items every two to three days.