The State of New Jersey Department of Environmental Protection Proposed State Implementation Plan
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- 2. Delaware Valley Regional Planning Commission (DVRPC)
- 3. Inventories by County and Nonattainment Area
MOBILE6 Results1. South Jersey Transportation Planning Organization (SJTPO) and North Jersey Transportation Planning Authority (NJTPA)Both the SJTPO and the NJTPA use a computer model called PPSUITE to combine traffic activity data from the travel demand models with other MOBILE6 inputs in order to estimate emissions from on-road sources. PPSUITE is a group of computer programs that modifies and converts output data from the travel demand models, generates MOBILE6 inputs files, and summarizes MOBILE6 outputs including the calculation of emission inventories using DVMT and emission factors. PPSUITE Version 5 was developed to be compatible with MOBILE6. The user interfaces with the PPSUITE programs through a set of user friendly windows that allow the user to set up and execute runs. PPSUITE allows the user to perform adjustments to the raw outputs from the travel demand models. PPSUITE calculates link capacities and speed distributions for each hour. VMT is spread and speeds are adjusted when overcapacity situations occur. PPSUITE also includes a region wide incident model that computes delays due to roadway incidents. PPSUITE combines the adjusted traffic activity data with the non-traffic-activity MOBILE6 input parameters (such as I/M program description) to generate a MOBILE6 input file. A separate MOBILE6 run is performed for each county with separate MOBILE6 scenarios performed for each roadway type. After MOBILE6 is run, PPSUITE multiples VMT by the MOBILE6 emission factors to produce emission inventory results. PPSUITE uses the composite MOBILE6 emission factors from the MOBILE6 descriptive output. The files used to generate the 1996, 2005 and 2007 on-road source emission inventories for the NJTPA counties are contained in Appendix I. The files used to generate the on-road emission inventories for the SJTPO counties are contained in Appendix II. 2. Delaware Valley Regional Planning Commission (DVRPC)The DVRPC uses a different process to calculate emissions. First, the travel demand model is used to determine the highway/transit volumes and the resultant VMT inventory. Output from the travel demand model is input into a postprocessor along with speed curve data to generate MOBILE6 inputs. The MOBILE6 inputs consist of speed distribution files (*.sp files), VMT by facility files (*.fc files), and hourly VMT files (*.hr files) for each county. One MOBILE6 run is then performed with each MOBILE6 scenario representing a different county. Composite emission factors from the MOBILE6 descriptive output are combined with VMT data in a spreadsheet to calculate emission inventories by county. The files used to generate the 1996 and 2005 on-road source emission inventories for the DVRPC counties are contained in Appendix III. 3. Inventories by County and Nonattainment AreaTable 5 presents the 1996, 2005 and 2007 on-road mobile source emission inventories by county and New Jersey portion of the nonattainment areas in tons per typical summer day. Table 6 presents the daily vehicle miles traveled for on-road vehicles by county and New Jersey portion of the nonattainment areas. Table 5 On-road Mobile Emission Inventory by County and Nonattainment Area (New Jersey Portions)
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