Freight Reliability Performance Management

System Performance Management regulations require State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) to establish Freight Reliability targets.

Freight Movement and Economic Vitality Freight Movement on the Interstate System Truck Travel Time Reliability on the Interstate (Truck Travel Time Reliability (TTTR) Index)
When do MPOs establish Freight Reliability targets?

States must establish two- and four-year freight reliability performance targets for the Interstate system every four years. Once the state informs the MPO it has set its performance targets, MPOs have 180 days to either set their own quantifiable four-year targets for the metropolitan planning area or support the state’s established four-year targets.

How are Freight Reliability targets reported?

States report their Freight Reliability targets to the Federal Highway Administration in their Performance Reports.  The Jackson MPO reports its targets every four years to the MS Department of Transportation (MDOT), and evaluates its progress toward achieving established targets every five years in the Metropolitan Transportation Plan.

How do you measure freight performance?

Freight movement is assessed by the Truck Travel Time Reliability (TTTR) Index with reporting divided into five periods:

Morning Peak (6 a.m. – 10 a.m. Monday – Friday)
Midday (10 a.m. – 4 p.m. Monday – Friday)
Afternoon Peak (4 p.m. – 8 p.m. Monday – Friday)
Weekends (6 a.m. –  8 p.m.)
Overnights for all days (8 p.m. – 6 a.m.)

The TTTR is generated by dividing the 95th percentile time by the normal time (50th percentile) for each segment.  The TTTR 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.

Baseline Performance
Performance Measure 2021 Mississippi Baseline 2021 Jackson MPO Baseline
Index of interstate mileage providing for reliable truck travel time 1.14 1.28
Freight Reliability Targets
Performance Measure 2022-2025 Target
Index of interstate mileage providing for reliable truck travel time <1.4

Resolution to Support the 2022-2025 Freight Reliability Targets

Jackson MPO Freight Reliability Analysis

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