早期美国公路的修建基本上由各级地方政府来规划和完成。第一条由地方政府规划并采用了工程设计修建的公路是从费城至兰开斯特的碎石路面公路,总长100公里,耗资46.5万美元,于1794年建成。联邦政府最早于1802年开始部分资助修建著名的坎伯兰国道。虽然美国历史上向西部开发的西进运动使坎伯兰公路不断扩展,但当时的铁路以其长途运输的优势,自然成为联邦政府重点支持的项 The construction of the early U.S. highways was basically planned and completed by local governments at all levels. The first highway planned and engineered by the local government was the gravel road from Philadelphia to Lancaster, with a total length of 100 kilometers and a cost of $ 465,000, completed in 1794. As early as 1802, the federal government began to partially subsidize the construction of the famous Cumberland National Road. Although the westward movement developed toward the west in the history of the United States made the Cumberland Highway expand continuously, the railway at that time naturally became the key supporter of the federal government because of its advantage of long distance transportation