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 2017-2021
TREND
Percent of Reliable Person-Miles Traveled on Non-interstate Roadways in NHS Network 2017-2021
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
Truck Travel Time Reliability Index 2017-2021
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 2017-2021
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?
The table represents the percentage of Non-SOV travel for the Ohio, Kentucky and Indiana regions of the OKI region. The charts show percentages for each Non-SOV travel mode by region and county.
TREND
Non-Single Occupancy Vehicle Travel 2019-2021
25% of all workers in the United States in 2020 and 27% in 2021 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 2015 Cincinnati ozone area includes portions of the Ohio counties of Butler, Clermont, Hamilton, and Warren; and the Kentucky counties of Boone, Campbell, and Kenton. On June 9, 2022, The U.S. Environmental Protection Agency (EPA) found that the Cincinnati, Ohio area had attained 2015 ozone National Ambient Air Quality Standard (NAAQS) and have been redesignated to a maintenance area. On November 7, 2022, EPA reclassified the Kentucky portion of the Cincinnati area to moderate nonattainment. With those new designations the OKI region is still required to maintain 2015 ozone standards and complete air quality conformity for both the Transportation Improvement Program (TIP) and the Metropolitan Transportation Plan (MTP). Ozone is formed through chemical reactions induced when sunlight reacts with volatile organic compounds (VOC’s) and oxides of nitrogen (NOx).
Forty-six CMAQ-funded transportation projects within the OKI region from 2017-2021 provided quantitative emissions benefits. These projects included traffic operations and safety improvements; roadway relocations and widenings; new turn lanes; bicycle and pedestrian facility improvements and additions; and bus replacements.