What is one major impact of the interstate highway system on truck freight services?

Answer: D — Improved efficiency in freight delivery

The major impact of the interstate highway system on truck freight services is improved efficiency in freight delivery. The development of the interstate highway system created a network of high-speed, well-maintained roads that facilitate faster and more direct transportation routes for truckers. This has significantly reduced travel times and allowed for the greater volume of goods to be transported over long distances. Moreover, the interstate system simplifies logistics by connecting major cities, manufacturing hubs, and distribution centers. This connectivity enables truck drivers to plan more efficient routes, leading to decreased fuel consumption and lower operational costs. As a result, freight delivery becomes not only faster but also more reliable, enhancing supply chain efficiency. In contrast, while increased competition among local carriers is a potential outcome of a more extensive highway network, it is more an indirect effect rather than a primary impact of the interstate highways themselves. Higher freight costs are also generally mitigated by improved efficiencies and economies of scale that the highway system enables. Lastly, the expansion into international markets is not directly tied to the interstate highway system’s impact on domestic freight services; it is more related to trade agreements and international logistics networks.