INDOT Specifications and Supplementals are available on the INDOT website,
Check to be sure you are using the latest (Current) specification on your project.
Be sure you check out the INDOT website, several items are available.
Below are several links to frequently used sites
INDOT Standard and Supplimental Specifications
INDOT Letting Schedule
Materials Management Information
INDOT HMA Plant Source Map
INDOT Aggregate Source Map