The 34th Edition of the Materials Book contains 403 materials specifications and test methods commonly used in the construction of highway facilities, including 63 revised and 7 new specifications and test methods. The specifications have been developed and maintained by transportation departments through participation in AASHTO's Subcommittee on Materials. The book is organized in two volumes, Materials and Testing, and each volume is separated into two books. Also includes is the single-volume AASHTO Provisional Standards, 2014 Editions, which includes an additional 66 provisional standards, including 8 updated and 13 new standards.