System Performance (Travel Time Reliability), Freight, CMAQ
On May 20, 2017, a Federal Highway Administration (FHWA) final rule took effect regarding Performance of the NHS, Freight, and CMAQ. The rule establishes performance measures that State Departments of Transportation (DOTs) and metropolitan planning organizations (MPOs) will use to report on the performance of the Interstate and non-Interstate National Highway System (NHS) to carry out the National Highway Performance Program (NHPP); freight movement on the Interstate system to carry out the National Highway Freight Program (NHFP); and traffic congestion and on-road mobile source emissions for the purpose of carrying out the Congestion Mitigation and Air Quality Improvement (CMAQ) Program. The rule addresses requirements established by the Moving Ahead for Progress in the 21st Century Act (MAP-21) and reflects passage of the Fixing America’s Surface Transportation (FAST) Act.
The performance measures under this rule are:
Interstate Travel Time Reliability Measure (% of person-miles traveled on the Interstate that are reliable)**
Non-Interstate Travel Time Reliability Measure (% of person-miles traveled on the non-Interstate NHS that are reliable)
Truck Travel Time Reliability Index (Sum of max TTTR for each segment/total Interstate system miles)
Peak Hour Excessive Delay (PHED) Per Capita*
% of Non-Single Occupancy Vehicle (SOV) Travel*
Total Emissions Reduction*
As indicated in the table above, MATS has chosen to support the State targets for Interstate, Non-interstate, and Freight reliability.
CMAQ stands for Congestion Mitigation and Air Quality, and the last three performance measures are applicable to areas that have been determined to not be in attainment of mandated air quality standards.
On April 4, 2023, MATS Policy Committee supported the following targets as promulgated by MDOT:
*Not applicable to MATS due to the attainment of air quality standards.
**Not applicable to MATS due to no Interstate mileage within the MATS area.