LECL Lewis and Clark NHT Auto Route Final Combined

As of 2025, this data set represents the official National Park Service centerline of the Lewis and Clark National Historic Trail Auto Route. The spatial data was created by the National Park Service with the assistance of interns from the U.S. Department of State Virtual Student Federal Service program. This layer was derived from roads data using TIGER/Line shapefiles from the U.S. Census Bureau. The Lewis and Clark National Historic Trail Auto Route is a system of roads and highways bracketing each side of the Lewis and Clark National Historic Trail, which commemorates the 1803-1806 expedition of Lewis and Clark and the Corps of Discovery. A total of 16 Trail states are connected by the Auto Route (Pennsylvania, West Virginia, Ohio, Kentucky, Indiana, Illinois, Missouri, Kansas, Nebraska, Iowa, South Dakota, North Dakota, Montana, Idaho, Washington, and Oregon). Each individual state designated the roads and highways that make up the Lewis and Clark Auto Route in collaboration with the National Park Service. The Auto Route provides the primary way in which visitors experience the Lewis and Clark National Historic Trail and travel to Trail destinations. The corresponding NPS DataStore on Integrated Resource Management Applications (IRMA) reference is LECL Lewis and Clark NHT Auto Route Final Combined.截至2025年，本数据集为美国国家公园管理局（National Park Service, NPS）发布的刘易斯与克拉克国家历史步道自驾路线官方中心线数据。该空间数据由美国国家公园管理局联合美国国务院虚拟学生联邦服务计划（U.S. Department of State Virtual Student Federal Service program）的实习生协助完成。本数据图层基于美国人口普查局（U.S. Census Bureau）提供的TIGER/Line shapefiles所提取的道路数据生成。刘易斯与克拉克国家历史步道自驾路线是环绕该步道两侧的道路与公路网络，该步道旨在纪念1803至1806年间刘易斯、克拉克与探索军团（Corps of Discovery）的远征探险行动。本自驾路线共连接16个途经州份，分别为宾夕法尼亚州、西弗吉尼亚州、俄亥俄州、肯塔基州、印第安纳州、伊利诺伊州、密苏里州、堪萨斯州、内布拉斯加州、艾奥瓦州、南达科他州、北达科他州、蒙大拿州、爱达荷州、华盛顿州与俄勒冈州。各州均与美国国家公园管理局合作，选定构成刘易斯与克拉克自驾路线的道路与公路路段。该自驾路线为游客体验刘易斯与克拉克国家历史步道、前往步道沿线景点的主要通行方式。其对应的综合资源管理应用程序（Integrated Resource Management Applications, IRMA）数据存储条目标识为LECL Lewis and Clark NHT Auto Route Final Combined。