PM3: System Performance

The final rule assesses the performance of the Interstate and non-Interstate National Highway System (NHS) for the purpose of carrying out the National Highway Performance Program (NHPP); assesses freight movement on the Interstate System; and assesses traffic congestion and on-road mobile source emissions for the purpose of carrying out the Congestion Mitigation and Air Quality Improvement (CMAQ) Program.

It was published on January 18th, 2017, with an effective date of May 20th, 2017. State DOTs were required to set targets by May 20, 2018, and MPOs have until November 16, 2018 (except for Traffic Congestion) to report their targets.  This rule is divided into the following 4 subparts.

For the target setting process, to the extent practicable, the MPO and State DOTs must coordinate in the selection of performance targets.

Traffic Congestion

This subpart is applicable to all urbanized areas that include National Highway System (NHS) mileage and have a population over 1 million that are, in all or part, designated as nonattainment or maintenance areas for Ozone (O3), Carbon Monoxide (CO), or Particulate Matter (PM10 and PM2.5) per National Ambient Air Quality Standards (NAAQS).

As the Memphis Urbanized Area, which covers parts of Tennessee, Mississippi, and Arkansas, including the Planning Areas of the Memphis Urban Area Metropolitan Planning Organization (MPO) and West Memphis MPO, meets the threshold set, the following performance measures applied to the Memphis, TN-MS-AR Urbanized Area:

  • Annual hours of peak hour excessive delay per capita
  • Percentage of non-single occupancy vehicle travel

On April 19, 2018, the Transportation Planning Board (TPB) of the Memphis Urban Area MPO approved a resolution to support the single, unified targets for the Tri-State Urbanized Area, which are shown in the table below:

TRAFFIC CONGESTION PERFORMANCE MEASURES

MEMPHIS, TN-MS-AR URBANIZED AREA

BASELINE (2017)

2-YEAR TARGET (2019)

4-YEAR TARGET (2021)

PERCENTAGE OF NON-SINGLE OCCUPANCY VEHICLE TRAVEL 16.6% 16.5% 16.5%
ANNUAL HOURS OF PEAK-HOUR EXCESSIVE DELAY NOT APPLICABLE NOT APPLICABLE 18.81

Additional MPO Documents

Resolution to Support the Tri-State CMAQ Performance Measure Targets Covering the Memphis, TN-MS-AR Urbanized Area 

Memphis MPO CMAQ Performance Measures Presentation

University of Tennessee PHED Analysis Presentation

Travel Time Reliability

State DOTs and MPOs are charged with reporting the measurement of travel time reliability on the Interstate and/or non-Interstate NHS. For each of the below performance measures, MPOs can agree to support the State DOT target, or establish their own target specific to the MPO planning area:

  • Percent of the Person-Miles Traveled on the Interstate that are reliable
  • Percent of the Person Miles Traveled on the Non-Interstate National Highway System that are reliable

Freight Reliability

The Moving Ahead for Progress in the 21st Century Act (MAP-21), and continued with the Fixing America’s Surface Transportation (FAST) Act, required a separate measure to provide data regarding freight reliability. This differs from the Travel Time Reliability measure and it is broken down into five periods: morning peak, midday, and afternoon peak Monday – Friday, weekends and overnight for each day. 

For the below performance measures, MPOs can agree to support the State DOT target, or establish their own target specific to the MPO planning area:

  • Percentage of Interstate System mileage providing reliable truck travel time

Total Emissions Reduction

This performance measure is only applicable to areas that include any part of a nonattainment or maintenance area. This measure is limited to these areas to further the CMAQ’s program purpose of funding programs and projects that seek to satisfy the National Ambient Air Quality Standards (NAAQS). If an MPO has a population of greater than 1 million, and is designated as a nonattainment and maintenance area, then both 2 and 4-year targets are required. If the population is less than 1 million, then only a 4-year target is required.

MPO’s have the option of either supporting the State DOT target, or choosing their own. MPOs have 180 days of the State’s selection to report their targets. 

  • Total emissions reductions by applicable pollutants under the CMAQ program

 

 

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