Bridge Performance Management

Bridge Condition Performance Management regulations require State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) to establish Bridge Condition targets for 2 performance measures.

NATIONAL GOAL PERFORMANCE AREA PERFORMANCE MEASURE
Infrastructure Condition Bridge Condition
  • % of National Highway System (NHS) bridges classified in Good condition
  • % of NHS bridges classified in Poor condition
When do MPOs establish Bridge Condition targets?

When establishing Bridge Condition targets MPOs may support the state’s 4-year targets, or establish their own quantifiable target for the metropolitan planning area.  States must establish 2-and 4-year Bridge Condition targets for all NHS bridges by May 20, 2018.  MPOs must establish Bridge Condition targets within 180 days of the State establishing and reporting its Bridge Condition targets; no later than November 16, 2018 and every 4 years thereafter.  States and MPOS are allowed to adjust 4-year targets at the target period’s midpoint.

How are Bridge Condition targets reported?

States report their Bridge Condition targets to the Federal Highway Administration in their Performance Reports.  The Jackson MPO reports its Bridge Condition targets every 4-years to the MS Department of Transportation (MDOT), and evaluates its progress toward achieving established targets every 5 years in the Metropolitan Transportation Plan.

Bridge Condition target calculations

Regulations require bridge conditions to be assessed based on the lowest assessment value of the deck, superstructure, substructure, or culvert.    The table below shows the thresholds for determining whether bridge conditions are in good, fair, or poor condition. As a minimum condition level, regulations establish a threshold of no more than 10% of NHS bridges measured by deck area being classified as structurally deficient.  The National Bridge Inventory (NBI) dataset is used to calculate good/poor bridge conditions, and states must submit NBI data annually by March 15th.

Measure Good Fair Poor
Deck ≥7 5 or 6 ≤4
Superstructure ≥7 5 or 6 ≤4
Substructure ≥7 5 or 6 ≤4
Culvert ≥7 5 or 6 ≤4

The percentage of total NHS bridge deck area for each classification (good, fair, and poor) would be calculated as the ratio of the total deck area of NHS bridges in a classification to the total deck area of NHS bridges in the state or MPO area as applicable:

% of NHS bridges in Good Condition = 100.0 * Total deck area of NHS bridges in Good Condition
Total deck area of NHS bridges in a state
% of NHS bridges in Poor Condition = 100.0 * Total deck area of NHS bridges in Poor Condition
Total deck area of NHS bridges in a state
Baseline Data
Performance Measure 2017 Mississippi Baseline

2017 Jackson MPO Baseline

% of NHS bridges by deck area in Good condition 61.75% 48.5%
% of NHS bridges by deck area in Poor condition 2.09% 0.0002%
2018 – 2021 Bridge Condition Targets
Performance Measure 2018-2021 Targets
% of NHS bridges by deck area in Good condition >60%
% of NHS bridges by deck area in Poor condition <5%
Resources

Resolution to Support the 2018-2021 Bridge Condition Targets

National Highway System (NHS)

1170 Lakeland Drive Post Office Box 4935 Jackson, MS 39296-4935 Title VI Site Map Webmail Contact