Federal Highway Administration mandates that recently went into effect require every agency that owns road signs to develop a sign management plan and ensure that regulatory and warning signs meet retroreflectivity standards from the Manual on Uniform Traffic Control Devices. This project updated MnDOT's Traffic Sign Maintenance/Management Handbook to give local agencies information about how to meet these requirements as well as guidance about removing unnecessary signs, which will lessen sign maintenance costs by reducing the size of the sign inventory.