PM2 - Pavement
Updated Using 2022 Data

The second of the performance measures rules (PM2) issued by the Federal Highway Administration (FHWA) establishes four measures to assess the condition of pavements on the National Highway System (NHS):

  1. Percentage of pavements on the Interstate System in Good condition
  2. Percentage of pavements on the Interstate System in Poor condition
  3. Percentage of pavements on the non-Interstate NHS in Good condition
  4. Percentage of pavements on the non-Interstate NHS in Poor condition

Good condition suggests that no major investment is needed, while Poor condition suggests that major investment is needed to improve the pavement condition.

FDOT established statewide two and four-year targets in coordination with the state’s MPOs, to the extent practicable, for each FHWA pavement performance measure. All 27 MPOs support the statewide targets including the intent to plan and program projects that are anticipated to support progress toward achieving the targets.

Methodology

Methodology: PM2 - Pavement

Details of the second performance rule (PM2) are available here.

The pavement performance measures refer to the percentage of pavement classified as in Good or Poor condition based on ratings for roughness (IRI), cracking percent, rutting, and faulting. The segment of pavement is considered to be in Good condition if all three metrics (IRI, cracking percent, and rutting or faulting) meet the criteria for Good. The segment is considered to be in Poor condition if two of the three metrics are rated to be Poor; and Fair if the segment does not meet the criteria for either Good or Poor condition. States are not required to report Fair pavement condition.

Thresholds for Pavement Performance Metrics

Metric rating Good Fair Poor
IRI
(inches/miles) 		< 95 95 – 170 > 170
Cracking Percent
(%) 		< 5
  • CRCP: 5 – 10
  • Jointed: 5 – 15
  • Asphalt: 5 – 20
  • CRCP: > 10
  • Jointed: > 15
  • Asphalt: > 20
Rutting
(inches) (for asphalt only) 		< 0.20 0.20 – 0.40 > 0.40
Faulting
(inches) (for jointed only) 		< 0.10 0.10 – 0.15 > 0.15


The pavement performance measures are calculated as follows:

Calculation

`"% Interstate Pavement in Good Condition " =` `(∑"Lane Miles of Interstate in Good Condition")/(∑"Lane Miles of Interstate excluding bridges, unpaved or other surface types and missing, invalid or unresolved data")`


`"% Interstate Pavement in Poor Condition " =` `(∑"Lane Miles of Interstate in Poor Condition")/(∑"Lane Miles of Interstate excluding bridges, unpaved or other surface types and missing, invalid or unresolved data")`


`"% Non-Interstate NHS Pavement in Good Condition " =` `(∑"Lane Miles of Non-Interstate NHS in Good Condition")/(∑"Lane Miles of Non-Interstate NHS excluding bridges, unpaved or other surface types and missing, invalid or unresolved data"`


`"% Non-Interstate NHS Pavement in Poor Condition " =` `(∑"Lane Miles of Non-Interstate NHS in Poor Condition")/(∑"Lane Miles of Non-Interstate NHS excluding bridges, unpaved or other surface types and missing, invalid or unresolved data"`
Definitions

Definitions: PM2 - Pavement

  • Cracking percent – Percentage of pavement surface exhibiting cracking. Cracking is defined as a fissure or discontinuity of the pavement surface not necessarily extending through the entire thickness of the pavement. It is applicable to Asphalt, Jointed Concrete, and Continuously Reinforced Concrete Pavements.
  • Faulting – Vertical misalignment of pavement joints in Portland Cement Concrete Pavements. It is applicable to Jointed Concrete Pavements only.
  • International Roughness Index (IRI) – Primary indicator of the utility of a highway network to road users. IRI is defined as a statistic used to estimate the amount of roughness in a measured longitudinal profile. It is applicable to Asphalt, Jointed Concrete, and Continuously Reinforced Concrete Pavements.
  • Present Serviceability Rating (PSR) – An observation-based system used to rate the quality of pavement condition. It is applicable only to roads with posted speed limits of less than 40 miles per hour (e.g., toll plazas, border crossings). States may choose to collect and report PSR for applicable segments as an alternative to the other four metric.
  • Rutting – Longitudinal surface depressions in the pavement derived from measurements of a profile transverse to the path of travel on a highway lane. It is applicable to Asphalt Pavements only.
Download Data

For information on state pavement measures, please click here.

Date of last refresh: 12/22/2023

SOURCES

Pavement Data from FDOT State Materials Office;
LRS Network from FDOT Transportation and Data Analytics (TDA) Office;