The US Environmental protection agency estimates that 2 billions hours are wasted annually by trucks waiting in queues at ports and warehouses.
Trucks in queues cost money
A truck waiting in a queue burns 0.8 gallon of fuel per hour. At the current price of gas, more than $7 billions dollars are burnt by trucks waiting in queues just in gas money, corresponding to the 2 billions hours wasted annually!
Delays lead to penalty fees
Beyond simply slowing down operations, delayed trucks, mean increased shipping costs and detention fees.