In a theater of operations, all modes of transport--air, rail, inland waterways, and motor--are used to move personnel, cargo, and unit equipment. Of these modes, motor transport is the most flexible. Motor transport supports movement requirements ranging from port clearance, tactical displacement, and distribution and retrograde of supplies and equipment throughout the depth of the battlefield. It also serves as the link between the other modes to support combat forces as far forward as possible. This manual, “Army Motor Transport Units and Operations (FM 55-30),” describes how motor transport units operate and the environment in which they operate. It incorporates changes to warfighting and support doctrine and equipment modernization. While this manual is designed primarily for motor transport units, the tactics, techniques, and procedures for convoy operations apply to most Army units under most operational conditions. The Army’s environmental strategy into the 21st century defines our philosophy and commitment in protecting and preserving the environment and natural resources for present and future generations. Sound environmental practices and considerations must be integrated into all Army documents, missions, and operations. In keeping with the Army’s vision to be a national leader in environmental stewardship, commanders and leaders must ensure that all local, state, federal, and host nation laws and regulations pertaining to the environment are included in the planning process and strictly followed. This publication implements the following international agreements: STANAG 2041 (Edition 4), Operation Orders, Tables and Graphs for Road Movement , STANAG 2154 (Edition 7), Regulations for Military Motor Vehicle Movement by Road, STANAG 2174 (Edition 4), Military Routes and Route/Road Networks, STANAG 2176 (Edition 2), Procedures for Military Road Movement Across National Frontiers.