Federal Performance Measures

The Fixing America’s Surface Transportation Act (FAST Act) requires that state departments of transportation (DOTs) and MPOs, including OKI, incorporate five new performance measures into the Congestion Management Process. The five performance measures:

Level of Travel Time Reliability

(LOTTR)

Level of Truck Travel Time Reliability

(LOTTTR)

Peak Hour Excessive Delay Per Capita

(PHED)

Percent of Non-Single Occupancy Vehicle Travel

Total Congestion Mitigation and Air Quality (CMAQ) Emissions

Level of Travel Time Reliability (LOTTR)

LOTTR assesses the consistency, or dependability, of travel times from day to day or across different times of the day on the interstate and non-interstate NHS systems. The Federal Highway Administration (FHWA) defines LOTTR as the percent of person-miles on the interstate and NHS that are reliable. LOTTR is calculated as the ratio of the longer travel times (80th percentile) to a “normal” travel time (50th percentile), using NPMRDS or equivalent data.

Data are collected in 15-minute segments between 6 a.m. and 8 p.m. Reliability measures were grouped into three weekday time periods (6-10 a.m., 10 a.m. – 4 p.m., 4-8 p.m.) and one weekend period (6 a.m. – 8 p.m.).

How is the OKI region doing?

Any roadway segment or corridor that has a reliability index of 1.5, or greater, during any time period is considered to be unreliable. The following tables show travel time reliability by person-miles traveled while the map shows travel time reliability for all vehicles by road segment..

TREND

Percent of Reliable Person-Miles Traveled on Interstates in NHS Network 2017-2020

TREND

Percent of Reliable Person-Miles Traveled on Non-interstates in NHS Network 2017-2020

Level of Truck Travel Time Reliability (LOTTTR)

FHWA defines Level of Truck Travel Time Reliability (LOTTTR) as the percent of truck-miles on the interstate system that are reliable. LOTTTR is calculated as the ratio of the longer travel times (95th percentile) to a “normal” travel time (50th percentile), using NPMRDS or equivalent data.

Data are collected in 15-minute segments throughout the day. Reliability measures were grouped into three weekday time periods (6-10 a.m., 10 a.m.-4 p.m., 4-8 p.m.), one weekend time period (6 a.m. – 8 p.m.), and one overnight time period for all days (8 p.m.-6 a.m.).

How is the OKI region doing?

Any roadway segment or corridor that has a reliability index of 1.5, or greater, during any time period is considered to be unreliable. The Truck Travel Time Reliability Index table shows freight reliability on the interstates by year and state while the map shows truck travel time reliability by road segment.

TREND

Travel Time Reliability Index 2017-2020

Peak-Hour Excessive Delay Per Capita

The extent of traffic congestion is measured by the number of transportation system users that are affected by congestion. FHWA measures this by the annual hours of peak hour excessive delay (PHED) per capita on the NHS in the Cincinnati, OH-KY-IN Urbanized Area. The threshold for excessive delay is based on the travel times at 20 miles per hour or 60 percent of the posted speed limit travel time, whichever is greater. And measured in 15-minute intervals. Peak travel hours are defined as 6-10 a.m. and 3-7 p.m. each weekday.

How is the OKI region doing?

The table shows annual PHED per capita while the map presents locations where excessive delay occurred.

TREND

Annual Hours of Excessive Delay per Capita – Cincinnati Urbanized Area 2017-2020

Congestion and Reliability Map

  • To view Level of Travel Time Reliability select the Reliability tab and choose “All Vehicles” in the map.
  • To view Level of Truck Travel Time Reliability select the Reliability tab and choose “Trucks (Interstates only)” in the map.
  • To view Annual Person Hours of Excessive Delay select the PHED tab in the map.

Non-Single Occupancy Vehicle Travel

Measuring non-single occupancy vehicle (SOV) travel, within an urbanized area, recognizes investments within the Cincinnati region that increase multimodal solutions and vehicle occupancy levels as strategies to reduce congestion and criteria pollutant emissions.

Modes of transportation recognized: carpooling, vanpooling, public transportation, commuter rail, walking, bicycling, tele-commuting.

How is the OKI Region doing?

TREND

Non-Single Occupancy Vehicle Travel 2018-2019

24% of all workers in the United States in 2018 and 2019 worked from home or used another mode of transportation other than driving alone to commute to work.

OKI Region SOV and Non-SOV Travel by County

Total Congestion Mitigation and Air Quality (CMAQ) Emission

The U.S. Environmental Protection Agency (EPA) designated nine counties in the Cincinnati region as a nonattainment area for ozone, under the 2015 ozone standard. Nonattainment means the area is not meeting national ambient air quality standards. Ozone is formed through photochemical reactions created when sunlight reacts with volatile organic compounds (VOC’s) and oxides of nitrogen (NOx).

Thirty-six CMAQ-funded transportation projects within the OKI region from 2015-2019 provided quantitative emissions benefits. These projects included traffic operations and safety improvements; roadway relocations and widenings; new turn lanes; and bus replacements.

How is the OKI region doing?

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