Bridge Condition
Updated Using 2024 Data

FDOT’s core bridge measure is the percent of bridges on the State Highway System (SHS) that meet FDOT standards. The target is to have at least 90% of bridges maintained by the Department achieve a National Bridge Inventory (NBI) rating of 6 or higher to meet the mandate of 334.046(4), F.S..

The NBI is a Federal Highway Administration (FHWA) requirement for evaluating bridge conditions. The requirement ranks bridges on a 0 to 9 scale, with 0 indicating a failed condition and 9 indicating an excellent condition. An NBI rating of 6 or 7 means a bridge is in good condition.

Note: Bridge conditions are calculated using a different method for federal performance (MAP-21) reporting purposes.

Methodology

Methodology: Bridge Condition

FDOT’s core bridge measure is determined as the ratio of bridges maintained by the Department with a National Bridge Inventory (NBI) rating of 6 or higher to the total FDOT-maintained bridges. Data are annually collected from July 1 to June 30. More information is available in the Bridge and Other Structures Inspection and Reporting.

Calculation

`"Bridge Condition" = (∑" FDOT-maintained bridges scoring NBI rating of 6 and above")/(∑" FDOT-maintained bridges") × 100"`

Reporting Periods

  • Peak Hour
  • Peak Period
  • Daily
  • Yearly
Definitions

Definitions: Bridge Condition

  • Bridge Condition: The state of a bridge based on a 0 to 9 scale, with 0 indicating a failed condition and 9 indicating an excellent condition.
  • Reporting Period
    • Yearly: FDOT fiscal year from July 1 to June 30.
  • State Highway System (SHS): Roads under the jurisdiction of the State of Florida and maintained by the Florida Department of Transportation or a regional transportation commission, typically roads with Interstate, US, and SR numbers.
  • Target Bridge Condition: At least 90% of bridges maintained by the Department having a National Bridge Inventory (NBI) rating of 6 or higher as mandated in 334.046(4), F.S..
Data Download

Date of last refresh: 10/07/2024

SOURCE

FDOT Office of Maintenance - AASHTOWare™ Bridge Management software (BrM) Version 5.3