MOVES Based Studies Clause Samples

MOVES Based Studies. In the study by ▇▇▇▇▇▇ et al., “Accounting for acceleration and deceleration emissions in intersection dispersion modeling using MOVES and CAL3QHC” (2013), it was found that because MOVES can be used to provide detailed emission rates for vehicles in acceleration and deceleration modes, it can significantly affect the location and concentration of CO near an intersection. The study used the MOVES Link Drive Schedule to determine modal emission rates. The CO acceleration emission factors were found to be significantly higher than cruise emission factors, indicating that acceleration emissions contribute more to total CO concentrations than cruise or idle emissions. The study also examined the impact of the number of sub-links used to characterize vehicle modal activity around an intersection. The number of sub-links used in modeling can substantially change the predicted concentrations in CAL3QHC. Figure 3.1, from the study, shows that increasing the number of acceleration sub-links increases the modeled peak CO concentrations. Indeed, the study found that increasing from 1 to 4 acceleration links increased modeled CO concentrations by 38%. The increase in links also moves the highest modeled concentration away from the beginning of the acceleration location. These findings may have important implications for both the location and magnitude of the maximum modeled CO concentrations at intersections. However, the study did not compare results with monitored data, so the effects on model accuracy are unknown. Figure 3.1 - CO Concentrations near a single roadway give a different number of acceleration sub-links (from ▇▇▇▇▇▇ et. al, 2013)