These 2015 interim revisions to the AASHTO LRFD Bridge Design Specifications, 7th edition, contain updates to the following sections of the specifications: Section 3, Loads and Load Factors; Section 4, Structural Analysis and Evaluation; Section 5, Concrete Structures; Section 6, Steel Structures; Section 10, Foundations; Section 11, Walls, Abutment, and Piers; Section 12, Buried Structures and Tunnel Liners; Section 13, Railings; and Section 14, Joints and Bearings.