Guide to Effective Methods for Setting Transportation Performance Targets (2022) / Chapter Skim
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From page 11... ...
11 Challenges in Target Setting Transportation practitioners face a range of challenges in setting targets for the national performance measures, and it is important to recognize these challenges when a method for target setting is being selected. These challenges arise from the basic structure of the target-setting requirements, interagency and interpersonal coordination issues, and technical and datarelated elements.
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From page 12... ...
12 Guide to Effective Methods for Setting Transportation Performance Targets Specificity/Rigidity of Targets Making or missing a target is binary, yet performance levels occur across a continuum. Some transportation agencies find the specificity of a target set to the second decimal place challenging, since they may miss a target by a very small amount.
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From page 13... ...
Practical Application 13 targets like "Vision Zero" compared with targets for fatality performance that are much higher than zero. The connotations around the term "target" raise concerns that the public or lawmakers will interpret a worsening target as an outcome desired by the agency rather than as a realistic estimate of outcomes.
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From page 14... ...
14 Guide to Effective Methods for Setting Transportation Performance Targets agency looked at the range of monthly average LOTTR values to consider as bounds for the target range and analyze how many roadway segments were at risk for changing from reliable to unreliable in future years (North Carolina DOT 2018)
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Practical Application 15 may vary. On the one hand, conditions may return to the previously exhibited trend.
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16 Guide to Effective Methods for Setting Transportation Performance Targets Steps for implementation: • Do not remove the abnormal value and proceed as usual. Cautions: • e outlier will skew any model t and associated predictions or forecasts in the direction of the shock.
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From page 17... ...
Practical Application 17 checkpoints along the way to a longer-term performance aspiration, rather than as ends in themselves, and use the targets as opportunities for communication and reflection on the path toward long-term goals. Leverage the Target-Setting Process Itself Some agencies have found that the process of establishing targets is itself a key element needed to see action to improve performance.
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From page 18... ...
18 Guide to Effective Methods for Setting Transportation Performance Targets Ground Measures and Targets in the Most Meaningful Form Some agencies have found that the specific thresholds and definitions for the national measures and metrics are not as relevant to their state's conditions or existing processes as would be ideal. For example, the threshold set for the national reliability metric gave one state results that did not correspond to all the problematic corridors in the state.
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