This report describes best practices for planning and conducting transportation-related route inventories. Route inventories identify all existing transportation-related linear features, including potential roads, primitive roads, trails, and travel-associated linear disturbances within a landscape unit. Additional transportation-related linear features, such as airstrips, railroads, and rivers, may also be included as necessary. This inventory methodology is a tool that may be used to help with land use plan development. The Bureau of Land Management (BLM) has established minimum national data standards for transportation-related linear, including Interagency Trail Data Standards (for National Scenic and National Historic Trails) used with transportation-related route inventories. The procedures described herein represent standard and accepted methods of planning for and conducting route inventories by using these minimum national data standards.