Evaluate all slopes, whether a cut or a fill and whether in soil or in rock, for global (overall) stability. Slopes steeper than 3:1 must have a documented evaluation. When warranted, evaluate for both short-term (undrained) and long-term (drained) conditions under Strength I limit state condition per current edition of AASHTO LRFD Bridge Design Specifications. However, the load factors are not compatible with limit equilibrium analysis and resistance factor is yet to be calibrated & implemented in commercially available software, overall stability analysis still be performed under Allowable Stress Design (ASD) methods.