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 National Highway System (NHS) Truck Travel Time Reliability on the Interstate (Truck Travel Time Reliability (TTTR) Index)
When do MPOs establish Freight Reliability targets?

When establishing Freight Reliability targets MPOs may support the state’s 4-year targets, or establish their own quantifiable target for the metropolitan planning area.  States must establish 2-and 4-year Freight Reliability targets by May 20, 2018.  MPOs must establish Freight Reliability targets within 180 days of the State establishing and reporting its targets; no later than November 16, 2018 and every 4 years thereafter.

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 4-years to the MS Department of Transportation (MDOT), and evaluates its progress toward achieving established targets every 5 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 Data
Performance Measure 2017 Mississippi Baseline

2017 Jackson MPO Baseline

Index of interstate mileage providing for reliable truck travel time 1.13 1.25
Freight Reliability Targets
Performance Measure 2019-2022 Target
Index of interstate mileage providing for reliable truck travel time <1.5

Resolution to Support the 2019-2022 Freight Reliability Targets

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