Guide to Truck Activity Data for Emissions Modeling (2019) / Chapter Skim
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27 5.1 Overview Project-level inputs in MOVES must be entered for each roadway link that is used to define a project. Project-level link activity may be described using average speed (Section 4.0)
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28 Guide to Truck Activity Data for Emissions Modeling 5.3 Sensitivity/Importance Case Study #1 (see Appendix A, available in NCHRP Web-Only Document 261) compares truck emissions using an average speed versus link-specific OMDs under a variety of situations, including various freeway and port situations modeled in a 2010 FHWA study (E.
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Drive Schedules and OMDs 29 Group Description opModeID opModeName Running 0 Braking Running 1 Idling Running 11 Low-Speed Coasting; VSP < 0; 1 <= Speed < 25 Running 12 Cruise/Acceleration; 0 <= VSP < 3; 1 <= Speed < 25 Running 13 Cruise/Acceleration; 3 <= VSP < 6; 1 <= Speed < 25 Running 14 Cruise/Acceleration; 6 <= VSP < 9; 1 <= Speed < 25 Running 15 Cruise/Acceleration; 9 <= VSP < 12; 1 <= Speed < 25 Running 16 Cruise/Acceleration; 12 <= VSP; 1 <= Speed < 25 Running 21 Moderate Speed Coasting; VSP < 0; 25 <= Speed < 50 Running 22 Cruise/Acceleration; 0 <= VSP < 3; 25 <= Speed < 50 Running 23 Cruise/Acceleration; 3 <= VSP < 6; 25 <= Speed < 50 Running 24 Cruise/Acceleration; 6 <= VSP < 9; 25 <= Speed < 50 Running 25 Cruise/Acceleration; 9 <= VSP < 12; 25 <= Speed < 50 Running 27 Cruise/Acceleration; 12 <= VSP < 18; 25 <= Speed < 50 Running 28 Cruise/Acceleration; 18 <= VSP < 24; 25 <= Speed < 50 Running 29 Cruise/Acceleration; 24 <= VSP < 30; 25 <= Speed < 50 Running 30 Cruise/Acceleration; 30 <= VSP; 25 <= Speed < 50 Running 33 Cruise/Acceleration; VSP < 6; 50 <= Speed Running 35 Cruise/Acceleration; 6 <= VSP < 12; 50 <= Speed Running 37 Cruise/Acceleration; 12 <= VSP < 18; 50 <= Speed Running 38 Cruise/Acceleration; 18 <= VSP < 24; 50 <= Speed Running 39 Cruise/Acceleration; 24 <= VSP < 30; 50 <= Speed Running 40 Cruise/Acceleration; 30 <= VSP; 50 <= Speed Running 501 brakewear; stopped Starts 101 Soak Time < 6 minutes Starts 102 6 minutes <= Soak Time < 30 minutes Starts 103 30 minutes <= Soak Time < 60 minutes Starts 104 60 minutes <= Soak Time < 90 minutes Starts 105 90 minutes <= Soak Time < 120 minutes Starts 106 120 minutes <= Soak Time < 360 minutes Starts 107 360 minutes <= Soak Time < 720 minutes Starts 108 720 minutes <= Soak Time Extended Idle 200 Extended Idling Table 5.3. MOVES operating mode bins.
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30 Guide to Truck Activity Data for Emissions Modeling much higher than the emission rates for default OMDs for incidents, signalized arterials, on ramps, and freeway-to-freeway interchanges. Note, however, that simulation model outputs have not been fully validated against real-world driving conditions.
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Drive Schedules and OMDs 31 3. Set up and run a microsimulation model of the project situation to be modeled and use the vehicle trajectories output by the model (the only option for developing future-year conditions different than base-year conditions)
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32 Guide to Truck Activity Data for Emissions Modeling Simulation models require a large amount of input data and considerable effort to validate the data and manipulate calibration parameters. However, simulation models are the only way of directly forecasting drive cycles under project conditions.
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Drive Schedules and OMDs 33 Case Study #7 (Appendix F, available in NCHRP Web-Only Document 261) describes how representative drive cycles, corresponding to OMDs in different situations from a variety of sources, were developed.
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