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Whether you are looking for more information, or you'd like to let us know how we did, you'll find easy ways to contact us here:

Here are a few other ways to get in contact with us:

Call Us (Non-Toll Related Inquiries)
Telephone: 305.637.3277
Monday - Friday
8:00 a.m. to 5:00 p.m. EST

Write Us (Non-Toll Related Inquiries)
Miami-Dade Expressway Authority
3790 NW 21st Street
Miami, Florida 33142

Email Us (Non-Toll Related Inquiries)

MDX Customer Service Center (Toll Related Inquiries)
Walk-in hours: 8:00 AM - 5:00 PM, Mon - Fri.
Telephone (Toll-Free): 1-855-277-0848
Location: SR 924 - Gratigny Expressway
Directions: From the Douglas Road Extension (SR 953), turn west onto the Gratigny Expressway (SR 924). The Customer Service Center is immediately on your right and is accessible from the ramp marked "MDX Customer Service Center."
Toll Inquiries


  • Stephan Andriuk
    Deputy Executive Director/Director of Toll Operations
    305.637.3277, ext. 2110
  • Marie T. Schafer, CPA
    Deputy Executive Director/CFO
    305.637.3277, ext.1136
  • Helen M. Cordero
    Manager of Procurement and Contracts Administration
    305.637.3277, ext. 1123
  • Mario Diaz
    Public Information Manager
    305.637.3277, ext. 2140
  • Carlos Zaldivar
    General Counsel
    305.637.3277, ext. 2210

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MDX is always looking towards innovative, reliable, cost-effective and safe solutions to the transportation needs of our community. We must work together in order to do this. Please do not hesitate to contact us with questions or comments.