 Input data preparation for the SMOKE-MOVES Integration Tool

1. Source Type Population
      1) Date sources
      2002-2003 Polk's data: Registration data from R. L. Polk & Co.'s National Vehicle Population Profile (R) (current as of October 2002) and R. L. Polk & Co.'s TIPNet (R) (current as of March 2003) are used.  This database includes number of vehicles by age and 16 vehicle types in each Georgia county, and has been used to develop age distribution.
      Georgia registration data (2003 and 2007): These registration data were obtained from www.georgiastats.uga.edu.  This database includes number of vehicles by passenger vehicles, trucks, trailers, motorcycles, buses and others in each county as explained on the Georgia Department of Revenue website (http://motor.etax.dor.ga.gov/stats/renewalsstats.aspx).  Passenger Vehicles include Ambulances, Convertibles, Coupes, Hearses, Jeeps, Limousines, Mixers, Motor Homes, Multi-Purpose Vehicles, Roadsters, Station Wagons, Touring Cars, Vans, 2 Doors, 3 Doors, and 4 Doors.  Trucks include Truck Tractors, Trucks, and Wreckers.
   
      2) Methodology
      The Polk's data were summarized by 16 vehicles types in each county and then grown to 2007 using different growth factors by vehicle types (Table 1).  The number of HDBS, HDBT and MC in Polk's data is comparable to Georgia registration data (Table 2 and Table 3).  Therefore, the numbers of HDBS and HDBT were grown to 2007 by multiplying ratios of the number of buses in Georgia motor vehicle registration data in 2007 and 2003.  The number of MC was grown to 2007 by multiplying ratios of the number of motor cycles in Georgia motor vehicle registration data in 2007 and 2003.  The number of the rest of vehicle types was grown to 2007 by multiplying ratios of human population in 2007 and 2002.  The Georgia motor vehicle registration data were not used for these vehicle types due to the difficulty to match the vehicle type used in Georgia motor vehicle registration data to the 16 vehicle types as used in the Polk's data.  Since the ratios of 2007 and 2003 passenger cars and trucks in motor vehicle registration data are comparable to the ratios of population data (Table 4), population data were used as the growth indicator.
   
Table 1. List of different growth factors used by vehicle types
                                 Vehicle types
                                 Growth factor
HDBS
Georgia registration data (2003 and 2007), Buses
HDBT
Georgia registration data (2003 and 2007), Buses
HDV2B
Population 2002 and 2007
HDV3
Population 2002 and 2007
HDV4
Population 2002 and 2007
HDV5
Population 2002 and 2007
HDV6
Population 2002 and 2007
HDV7
Population 2002 and 2007
HDV8A
Population 2002 and 2007
HDV8B
Population 2002 and 2007
LDT1
Population 2002 and 2007
LDT2
Population 2002 and 2007
LDT3
Population 2002 and 2007
LDT4
Population 2002 and 2007
LDV
Population 2002 and 2007
MC
Georgia registration data (2003 and 2007), Motor cycles

Table 2. Summary of 2002-2003 Polk's data by 16 mobile vehicle types in four Georgia regions
Vehicle types
                                     ATL13
                                     ATL7
                                     GAGAS
                                    GAOTHER
                                     Total
HDBS
                                                                          7,854
                                                                          1,333
                                                                          2,032
                                                                          8,221
                                                                         19,440
HDBT
                                                                          1,362
                                                                            102
                                                                            139
                                                                            540
                                                                          2,143
HDV2B
                                                                         56,809
                                                                         11,761
                                                                         15,405
                                                                         49,039
                                                                        133,014
HDV3
                                                                         27,628
                                                                          5,996
                                                                          7,822
                                                                         23,797
                                                                         65,243
HDV4
                                                                         13,623
                                                                          2,262
                                                                          2,850
                                                                         10,351
                                                                         29,086
HDV5
                                                                          6,005
                                                                          1,162
                                                                          1,550
                                                                          5,577
                                                                         14,294
HDV6
                                                                         19,294
                                                                          4,088
                                                                          5,932
                                                                         21,688
                                                                         51,002
HDV7
                                                                         16,380
                                                                          2,528
                                                                          3,838
                                                                         15,309
                                                                         38,055
HDV8A
                                                                         37,555
                                                                          4,307
                                                                          6,619
                                                                         31,883
                                                                         80,364
HDV8B
                                                                         14,449
                                                                          2,201
                                                                          3,061
                                                                         10,926
                                                                         30,637
LDT1
                                                                        722,044
                                                                        131,873
                                                                        181,393
                                                                        607,189
                                                                      1,642,499
LDT2
                                                                         95,101
                                                                         28,933
                                                                         37,692
                                                                        156,187
                                                                        317,913
LDT3
                                                                        302,139
                                                                         62,530
                                                                         75,409
                                                                        284,851
                                                                        724,929
LDT4
                                                                         43,616
                                                                          8,019
                                                                          9,721
                                                                         39,432
                                                                        100,788
LDV
                                                                      1,723,769
                                                                        255,647
                                                                        346,907
                                                                      1,383,696
                                                                      3,710,019
MC
                                                                         50,081
                                                                         10,657
                                                                         13,767
                                                                         41,123
                                                                        115,628

Table 3. Summary of 2003 Georgia registration data by 4 mobile vehicle types
Vehicle types
                                     ATL13
                                     ATL7
                                     GAGAS
                                    GAOTHER
                                     Total
Buses
                                                                         10,676
                                                                          1,559
                                                                          2,434
                                                                          9,797
                                                                         21,237
Trucks
                                                                        558,496
                                                                        168,930
                                                                        237,022
                                                                        823,867
                                                                      1,788,315
Passenger Cars
                                                                      2,259,027
                                                                        339,456
                                                                        449,177
                                                                      1,744,474
                                                                      4,792,134
Motorcycles
                                                                         46,836
                                                                         10,203
                                                                         13,124
                                                                         38,561
                                                                        108,724

Table 4. Comparison between different growth factors




Ratios

2002
2003
2007
2007/2002
2007/2003
Motor vehicle registration
Passenger Car

                                                                      4,792,134
                                                                      5,330,256

                                                                          1.112
Trucks

                                                                      1,788,315
                                                                      1,952,470

                                                                          1.092
Motor Cycle

                                                                        108,724
                                                                        174,617

                                                                          1.606
Bus

                                                                         21,237
                                                                         35,124

                                                                          1.654
Population in Georgia, U.S. Census
Population
                                                                      8,585,535
                                                                      8,735,259
                                                                      9,533,761
                                                                          1.110
                                                                          1.091
Total Average Annual Daily VMT in Georgia, Georgia DOT 445 report, miles
VMT
                                                                    292,562,380
                                                                    296,810,994
                                                                    305,327,543
                                                                          1.044
                                                                          1.029
MOVES national SALESGROWTH factor defaults
Motorcycle
                                                                               
                                                                               
                                                                               
                                                                          1.383
                                                                          1.311
Passenger Car
                                                                               
                                                                               
                                                                               
                                                                          0.940
                                                                          1.001
	
Passenger Truck
                                                                               
                                                                               
                                                                               
                                                                          0.972
                                                                          0.948
Light Commercial Truck
                                                                               
                                                                               
                                                                               
                                                                          0.972
                                                                          0.948
Intercity Bus
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Transit Bus
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
School Bus
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Refuse Truck
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Single Unit Short-haul Truck
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Single Unit Long-haul Truck
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Motor Home
                                                                               
                                                                               
                                                                               
                                                                          1.353
                                                                          1.268
Combination Short-haul Truck
                                                                               
                                                                               
                                                                               
                                                                          1.464
                                                                          1.405
Combination Long-haul Truck
                                                                               
                                                                               
                                                                               
                                                                          1.464
                                                                          1.405


   The projected 2007 vehicle population by 16 vehicle types in each county were then converted to 32 vehicles types, which were matched with 28 vehicle types and 12 vehicle types (corresponding to 12 SCC codes) as shown in the EPA MOVES converter tool.  The EPA MOVES converter tool was also used to convert vehicle population in MOVES format by each of the four reference counties. These populations are the sum of populations of all counties sharing the same reference counties.
   
2. VMT
      1) Date sources
      GADOT445 report: 2007 VMT by 18 road types was obtained from: http://www.dot.state.ga.us/statistics/RoadData/Pages/400Series.aspx.
      The VMT by 18 road types was converted to the 12 HPMS road types as follows:
      Rural Interstate + Small Urban Interstate + Small Urban Freeway
      Rural Principal Arterial + Small Urban Principal Arterial
      Rural Minor Arterial + Small Urban Minor Arterial 
      Rural Minor Collector + Small Urban Collector
      Rural Local + Small Urban Local
      VMT mix by 28 vehicle types: Three types of VMT mix were used for three groups of counties respectively, including ATL13, ATL7 and others.  These VMT mix were outputs from Mobile6 runs, with different age distribution inputs for each group of counties.
      2) Methodology
VMT by 12 road types was multiplied by the VMT mix to get VMT by 12 road types and 28 vehicle types, which were matched with SCCs to get VMT by SCC.
      
      The VMT by 12 road types was also summed up for all counties sharing the same representative county.  Such VMT by each representative county and corresponding VMT mix was input into the EPA converter tool to the MOVES format.
   

      
