System Performance, Freight and CMAQ

The Federal Highway Administration published the System Performance/Freight/CMAQ Performance Measures Final Rule on Jan. 18, 2017, with an effective date of May 20, 2017. It assesses the performance of the Interstate and non-Interstate National Highway System for the purpose of carrying out the National Highway Performance Program; 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 & Air Quality Improvement Program.

 
The Colorado Department of Transportation was required to set targets by May 20, 2018, and DRCOG had until Nov. 16, 2018 (except for Traffic Congestion) to report their targets. With the exception of Traffic Congestion, DRCOG can elect to support CDOT's targets or set its own for the region.
 

Travel Time Reliability

CDOT and DRCOG are charged with reporting the measurement of travel time reliability on the Interstate and/or non-Interstate National Highway System. CDOT is required to set two-year and four-year targets, while DRCOG only had to set targets every four years. The DRCOG Board elected to support CDOT’s performance targets related to travel time reliability. 
 

Travel Time Reliability Performance Measures

Baseline Two-Year Targets Four-Year Targets
Percent of the Person Miles Traveled on the Interstate that are Reliable 81.7% N/A 81%
Percent of the Person Miles Traveled on the Non-Insterstate NHS that are Reliable 63.5% N/A 64%

 

Freight Reliability

The FAST Act requires a separate measure for travel time reliability for freight on the interstate system, the Truck Travel Time Reliability Index. It is broken down into five periods: morning peak, midday, and afternoon peak Monday – Friday, weekends, and overnight for each day. The TTTR ratio is generated by dividing the 95th percentile time by the 50th percentile for each segment. The TTTR Index will be generated by multiplying each segment’s largest ratio of the five periods by its length, then dividing the sum of all length-weighted segments by the total length of Interstate. 
 
CDOT is required to set two-year and four-year targets for Freight Reliability, while DRCOG only needed to set four-year targets. For the below performance measure, MPOs can agree to support the State DOT target, or establish their own target specific to the MPO planning area. The DRCOG Board elected to support CDOT’s performance targets related to freight reliability
 

Freight Reliability Performance Measures

Baseline Two-Year Targets Four-Year Targets
Truck Travel Time Reliability Index (TTTR) 1.45 N/A 1.5

 

Traffic Congestion Reduction

This subpart is applicable to all urbanized areas that include National Highway System 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 or PM2.5) per National Ambient Air Quality Standards. 
 
As the Denver-Aurora, CO Urbanized Area, including the Planning Area of DRCOG, meets the threshold set, this subpart applied to the Denver-Aurora, co Urbanized Area. These targets had to be set jointly between the MPO and corresponding State DOT.
 
Completed jointly with CDOT, the DRCOG Board and CDOT Transportation Commission established the following performance targets.
 

Traffic Congestion Reduction Performance Measures

Baseline Two-Year Targets Four-Year Targets
Percent of Non-Single Occupancy Vehicle Travel 23.8% 24% 25%
Annual Hours of Peak-Hour Excessive Delay per Capita 47.65 52 54

 

On-Road Mobile Source Emissions Reduction

This performance measure is only applicable to areas that include any part of a nonattainment or maintenance area for Ozone (O3), Carbon Monoxide (CO), or Particulate Matter (PM10 and PM2.5) per the National Ambient Air Quality Standards. This measure is limited to these areas to further the CMAQ’s program purpose of funding programs and projects that seek to satisfy the NAAQS. If an MPO has a population of greater than 1 million, and is designated as a nonattainment and maintenance area, then both two- and four-year targets are required. If the population is less than 1 million, then only a four-year target is required.
 
As the DRCOG planning area has a population greater than 1 million and is designated as nonattainment/maintenance for Ozone (O3), Carbon Monoxide (CO), and Particulate Matter (PM10), two- and four-year performance targets for each of those criteria pollutants had to be established.  
 
The DRCOG Board established targets based on cumulative 2 and 4-year emission reductions for CMAQ funded projects in the DRCOG region.
 

Total Emissions Reduction Performance Measures

Baseline Two-Year Targets Four-Year Targets
Total Emissions Reductions (VOC) kg/day 88.616 86 105
Total Emissions Reductions (PM10) kg/day 40.714 31 152
Total Emissions Reductions (CO) kg/day 1,682.796 1,152 1,426
Total Emissions Reductions (NOx) kg/day 391.338 86 105