Frequently Asked Questions

The Miami-Dade Expressway Authority (MDX) is a State of Florida public agency created in 1994 by the Florida Legislature and the Miami-Dade County Commission. MDX has the responsibility to operate, maintain, improve and expand five expressways in Miami-Dade County: State Road 924 (Gratigny Parkway), State Road 112 (Airport Expressway), State Road 836 (Dolphin Expressway), State Road 874 (Don Shula Expressway), and State Road 878 (Snapper Creek Expressway).

MDX was created to ensure that tolls collected on its system would remain in the county and be reinvested on the MDX system. Prior to MDX, tolls collected would be sent to Tallahassee and then redistributed throughout Florida. Improvements on MDX roads are funded by the very users that experience them.

MDX is governed by a 13-member volunteer board appointed by the Governor and the Miami-Dade County Commission. There is a professional staff which establish near term and long term work programs.

MDX is entirely funded by toll revenues collected on its system. No funding is received from gas, property nor the half-penny sales tax. It is a user-funded system, and revenue collected is reinvested on system-wide improvements in the form of expressway extensions, new lanes and ramps, roadway maintenance, providing greater mobility and connectivity in the South Florida area.

• SunPass - if you do not already have a SunPass, you may purchase a SunPass Mini at your nearby Publix, AAA office, Navarro Discount Pharmacy, Sedano's Supermarket or CVS for $4.99. To learn more, visit www.sunpass.com or call 1-888-865-5352.
• Toll-By Plate - See section below

Toll rate maps and Toll rate schedules can be found on our website.

• SunPass is the least expensive option with drivers saving an average of 15 cents at each tolling point.
• SunPass customers also save when they drive on other toll roads in Florida, saving approximately 25 percent or more at most toll plazas.
• SunPass Plus customers can use their transponders to pay the parking fees at the Tampa, Orlando and Palm Beach airports.

You may purchase your SunPass online at www.sunpass.com or at a retail location. SunPass transponders are available for purchase at over 1100 Publix Supermarkets, AAA offices, Navarro Discount Pharmacy, Sedano's Supermarket and CVS/pharmacy in Florida.

It costs more to collect a toll by taking a photo of your license plate and sending out an invoice than it does to read a SunPass transponder.

Yes, SunPass can be used on almost all toll roads and bridges in the State of Florida. Just look for the SunPass logo as you enter the highway or tolling zone.

No, the SunPass electronic toll collection system is not compatible with transponders from any state other than Florida. E-Pass, from Orlando, and LeeWay, from Lee County, are compatible and may be used on any SunPass facility and vice versa.

Ideally, yes. Realistically, there is work to do. Today, many agencies have electronic toll systems that are unique to their individual community, state or region and the equipment often does not function with other toll agencies in different areas. Developing uniform electronics and compatible business operations for a universal national system will be a challenge, but the industry is aware of the problem and is working diligently toward a solution.

Toll-by-Plate is a tolling system that works like SunPass without the transponder. Today this is only available as a post paid system, but future enhancements may include a pre-paid option if demand for this account type is recognized. With a Toll-by-Plate account, drivers will not receive the SunPass discount on the MDX roads.

A digital imaging system takes pictures of the vehicle's license plate as it travels through the tolling point. The license plate data provides the needed information to obtain the registered owners address so an invoice can be generated and mailed.

Through the Toll-By-Plate program, the tolling equipment will take photos of each vehicle that goes through a tolling point that fails to register a valid SunPass transaction. The license plate data is then used to obtain the registered owner's address from the State Motor Vehicle Department that issued that particular license plate. An invoice for unpaid tolls will be sent to the registered owner directly to the address listed on their vehicle registration.

Once you have traveled on the MDX roads the first time, you will receive an invoice within about one week. For any subsequent travel, you will receive a monthly invoice.

Payment is due 30 days after the invoice is issued. Your invoice will show the due date.

The easiest way is to pay online with a credit or debit card. You may also mail in a payment to PO Box 628282, Orlando, FL 32862-8282 or call our Customer Service Center 888-833-0910.

• Most likely this is because your SunPass did not read and your vehicle license plate was not registered on your SunPass account. If this is the case, you may be charged the Toll-By-Plate transaction rate as outlined in your account agreement. If your SunPass account is in good standing at the time of the transactions, all you have to do is call SunPass at 888-865-5352 and update your vehicle information. Be sure to have your account number and pin, as well as the invoice when you call. They will be able to update your information and handle the payment of the invoice.
• It could also be that your SunPass account is not in good standing. Did your credit card expire? Did your account go negative? Call SunPass 888-865-5352 to verify your account information. If your account was not in good standing, you will need to pay the invoice in full to MDX at www.GoMDX.com or call us at 1-888-833-0910

Call us at 888-833-0910. The Customer Service Center is open Monday through Friday 7 am to 7 pm.

By law, the invoices must be sent to the registered owner of the vehicle and since it can be complicated to match the exact registered name and address, it is best to send invoices for each vehicle separately.

You will receive a separate invoice from each of the toll authorities for each vehicle that travels on their toll facilities.

If you are able to provide the required information on the Affidavit Form identifying the person in possession of the vehicle with your license plate, have it notarized send it to MDX. This may resolve your liability entirely. If you cannot complete the Affidavit, you will be responsible for the invoice.

Since these facilities are funded by the tolls, everyone who travels through the toll point must pay the toll.

An invoice for the tolls on the MDX roads will be mailed to the registered owner of the vehicle. You should advise the owner that you drove on a toll road and that he/she will receive a bill in the mail. By law, the owner of the vehicle is responsible for the toll payment even if someone else uses that vehicle, unless an affidavit is completed, notarized and returned to MDX. An affidavit form is available by clicking this link: Affidavit Form.

An invoice for the tolls on the MDX roads will be mailed to the registered owner of the vehicle. By law, the owner of the vehicle is responsible for the toll payment even if someone else uses that vehicle, unless an affidavit is completed, notarized and returned to MDX. An affidavit form is available by clicking this link: Affidavit Form.

A UTC must be resolved within 30 days of the issue date or it will be filed with the Miami-Dade Court. Additional fines and fees may be assessed. Refer to the UTC for special instructions and options.

Many rental car companies have programs that offer rental car customers an easier way to travel Florida's toll roads. The companies provide SunPass with constantly updated lists of rental car fleet license plate numbers so that rental companies can be billed for tolls incurred by their customers. Each company has a different payment arrangement so be sure to review your rental agreement carefully. Of course, if you have a portable SunPass you may also use it in a rental car, just log onto your account at www.sunpass.com and enter the rental vehicle for the duration (start/end) of your rental.

All major rental companies are participating in this program, ask your rental car service representative if they are in the SunPass program. Some companies charge a daily or weekly fee, plus the toll incurred. Others provide unlimited toll usage for a set per day or per week amount. We recommend that customers check with their rental car company for all fees and that they read their car rental agreement carefully.

An image of the license plate will be captured on camera and a bill for the toll will be sent to the registered owner of the vehicle rental. The vehicle rental agency may pay the toll bill on your behalf and charge you extra fees for their time and service, based on your rental agreement. We strongly recommend that customers check their rental agreement for all fees. Many rental companies charge a service fee for toll payments that they make on your behalf. If this is prior to your rental, you can open a Toll By Plate account by logging on to www.tollbyplate.com or by calling 888-824-8655.

A bill for the toll will be sent to the rental car company, who will match the toll charges with the person renting the car. The rental car agency may pay the toll bill on your behalf and charge you extra fees for their time and service, based on your car rental agreement. Others may reassign the toll charges via completion of an affidavit, as outlined in the Florida Statute. We strongly recommend that customers check with their rental car company for all fees and that they review the rental agreement carefully.

An image of the truck or trailer license plate will be captured on camera and a bill will be issued to the registered owner of the vehicle. The truck leasing company may pay the bill on your behalf and charge you extra fees for their time and service. We strongly recommend that customers check with their lease company for all fees and review the rental agreement carefully.