ADOT employees, faculty of Arizona public colleges and universities, and transportation officials of Arizona cities and counties may borrow circulating items from the library. Graduate students at Arizona public universities may request borrowing privileges by submitting a letter on department letterhead signed by a faculty member.
All materials circulate except periodicals, reference items, computer software and manuals, indexes, vault reports, and the original, camera-ready copies of Research Center reports. Study guides for engineer-in-training and professional-engineer tests circulate only to ADOT employees.
The standard loan period is one month. The borrower may renew an item two times, provided no one else has asked for it.
The borrower is responsible for returning items borrowed. The borrower may choose to have items sent and to return items via interagency mail or the U.S. Postal Service; however, the borrower is liable for the book if it is lost. The library will suspend or limit borrowing privileges of clients who do not return library materials. Borrowers who have kept items for more than six months will have their borrowing privileges suspended until the items are returned. They must replace or pay for lost, destroyed or damaged items. The library will replace books kept for more than one year and will charge the replacement cost to the borrower. Borrowers who leave or change their current employment or student status must return all borrowed items to the library.