The purpose of this report is to inform State Design, Construction, and Maintenance Engineers of accepted procedures for the investigation and design of potential landslide prone areas. State Materials and Geotechnical Engineers should be consulted for design recommendations. This report contains a sequential procedure for determining areas of landslide potential. The sequence begins with observations which can be made in the office progressing through field reconnaissance and testing to roadway design. Some sample specifications relating to internal drainage methods are offered in the appendices.