Card Sound Toll Authority


The Card Sound Toll Authority is primarily responsible for operating the Card Sound Bridge toll booth in North Key Largo. The department also maintains the toll facilities and grounds and mows and cuts brush on the right of way along Card Sound Road.

Tollbooth Being Converted to All-Electronic Tolling System

The last hand-collected toll was Thursday, Aug. 31, 2017, at midnight. The tollbooth has been demolished.

During construction of the All-Electronic Tolling System, no tolls will be collected.

With the new system, all tolls will be collected electronically. Motorists will use either SunPass®, an interoperable transponder or TOLL-BY-PLATE. Cash will not be accepted on the roadway. 

TOLL-BY- PLATE customers will be charged the toll plus a monthly $2.50 administrative fee and will be billed by mail. The expected start of June 2 for collecting tolls by the new electronic system has been postponed due to construction delays. A new start date will be announced when available.

New Toll Rates

The Board of County Commissioners set the new toll rates, which will help to fund future repair and replacement of the five bridges along Card Sound road:

  • $1.50 for two-axle vehicles: cars, pickup trucks or motorcycles. This is 75 cents per axle for two-axle vehicles only.
  • $1.00 per axle for vehicles with more than two axles 

This is an increase from the 50-cents per axle that was first put in place in 1989 and had been at that rate for decades with the exception of a three -year period from 1992-95 when it was 75 cents per axle. The original toll was 50-cents per car in 1964.

The BOCC also approved two forms of Card Sound toll discounts at its March meeting at the Murray Nelson Government Center in Key Largo.


  • For frequent users who drive two-axle vehicles
  • Automatically receive a 40% rebate on SunPass® account after any calendar month you make at least 28 one-way trips through the toll
  • Must make trips using a valid SunPass® transponder
  • Transponder must be used on the vehicle to which it is registered
  • You do not need to sign-up for this program. It’s automatic.


  • Annual pass program begins Jan. 1, 2019
  • To be eligible to participate, you must first purchase a SunPass® transponder and open an account with a $10 initial prepaid balance
  • For frequent users who drive two-axle vehicles
  • You must sign up for the program with the Card Sound Toll Authority and pay an annual fee of $360
  • Provides unlimited trips through the toll for a year (Jan. 1 through Dec. 31)
  • Annual Pass is only valid for the vehicle and license plate enrolled or with the SunPass® transponder listed on the application
  • Annual Pass is not transferable to another vehicle

NOTE: Discount programs do not apply to vehicles towing a boat or trailer. Your account will be charged $1 per axle for any vehicle going through the toll with three axles or more, even if you have an annual pass. And trips made through the toll with three axels or more will not count toward the rebate program.

More information: Contact Don Crouch with Monroe County. Work: 305-453-8761 or Cell: 305-797-1702; Email


The new toll rate is needed to pay for personnel and maintenance costs for Card Sound Road and the five bridges on it. These costs have increased over time and the annual costs will soon surpass annual revenue.

In addition, the County’s 2014 bridge assessment report states the primary Card Sound Bridge should be scheduled for replacement in 2030 at an estimate price tag of $32 million.