For Vendors

For Vendors

AAATA practices fair and open competitive bidding procedures to procure goods and services. We optimize the investment of taxpayer dollars by selecting vendors that give us the best value – price and other factors considered.

Process for Obtaining Bids 

To obtain bid documents, you must register for the Michigan Intergovernmental Trade Network (MITN) BidNet Direct system. BidNet assistance is available Monday-Friday, 8 a.m. - 8 p.m. by calling 800-835-4603.

View List of current Bids

Purchase Order Terms & Conditions

The terms and conditions of our procurements can vary depending upon the nature and dollar amount of the goods or services being purchased and the applicability of various federal, state and local legal requirements.

Disadvantaged Businesses

AAATA participates in the Michigan Unified Certification Program for DBE Vendors. Certification Agencies for DBE vendors are listed below. Certification by any one of these agencies is recognized by all transit systems in the State of Michigan. 


AAATA has published its DBE Goals for FY 2021-2023, and is seeking comment through October 1, 2020.  The notice is available here, by emailing, or by mail to:

AAATA DBE Program, Procurement Department, 2700 S. Industrial Highway, Ann Arbor, MI 48104

To request DBE certification information, contact any of the following:

Michigan Department of Transportation

Office of Equal Opportunity
P. O. Box 30050
Lansing, MI 48909

Detroit Department of Transportation

Contract Compliance
1301 E. Warren
Detroit, MI 48207

Suburban Mobility Authority for Regional Transportation

DBE/EEO Program
660 Woodward Avenue - Suite 900
Detroit, MI 49226