What mode of transportation accounts for almost 100% of intraurban freight trips in the US?

The mode of transportation that accounts for almost 100% of intraurban freight trips in the US is trucks. This is primarily due to the flexibility and efficiency trucks offer for transporting goods over short distances within cities. Trucks can easily navigate urban areas, providing door-to-door service which is essential for delivering freight directly to retailers or consumers. They are well-suited for the variable nature of urban delivery, allowing for rapid response to changing demands and scheduled deliveries.

Additionally, the infrastructure in urban settings—such as road networks—is predominantly designed to accommodate truck traffic, making it practical for businesses to rely almost entirely on trucking for their freight needs. Factors like the growing e-commerce industry have further cemented the truck's role, as timely delivery of goods directly to urban locations is a critical component of customer satisfaction.