Document ID: EPA-R04-OAR-2013-0084-0019
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2016-01-11T05:00Z

Exhibit 2  -  Vehicle Classification Counts
Weekday vehicle classification counts from GDOT were obtained for the years 2008 through 2010 for the entire state of Georgia.  The counts were stratified by two areas, the counts within the 13-county portion of the Atlanta MPO area, and the remaining statewide counts.  In order to provide a reasonable sample, the remaining statewide counts were used to factor the outer 7-county portion of the nonattainment area.  The vehicle classification counts collected were stratified based on the FHWA vehicle classifications.  The counts were then summarized into the 6 HPMS vehicle type categories.  This result was then summarized for the three years.  The percent by vehicle type by road type based on functional classification was calculated.  The counts by the area type (urban versus rural) were combined since FHWA eliminated the urban/rural area type distinction from HPMS functional classifications beginning with the 2009 data, reported in 2010.

Table 1, below, lists the counts by year for the 13-county area. Table 2 lists the final factors which were applied to the 13-county area VMT by vehicle type by road type based on the counts.   Table 3 lists the counts by year for the 7-county area.  Table 4 lists the final factors which were applied to the 7-county area VMT by vehicle type by road type based on the counts.  These values were used to weight the VMT from the travel demand model by road type by vehicle type for input into AADVMT worksheet importer.
 
                Table 1  -  GDOT Vehicle Classification Counts
                             13-County Atlanta MPO
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                       
          Table 1 (continued)  -  GDOT Vehicle Classification Counts
                             13-County Atlanta MPO
                                       
                                       
                                       
         Table 2  -  Final Factor of VMT by Vehicle Type by Road Type
                             13-County Atlanta MPO
                                       
                                     Code
HPMS Vehicle Type
FHWA Veh Class
 Restricted Access 
 Unrestricted Access 
 Restricted Access Factor
 Unrestricted Access Factor
                                      10
Motorcycles
Class 1
                                                                      3,652,451
                                                                        838,694
                                                                       0.002184
                                                                       0.002291
                                      20
Passenger Cars
Class 2
                                                                  1,270,928,377
                                                                    285,644,317
                                                                       0.759844
                                                                       0.780335
                                      30
Other 2 axle-4 tire vehicles
Class 3
                                                                    261,847,644
                                                                     60,069,872
                                                                       0.156550
                                                                       0.164101
                                      40
Buses
Class 4
                                                                     10,055,608
                                                                      2,203,498
                                                                       0.006012
                                                                       0.006020
                                      50
Single Unit Trucks
Class 5-7
                                                                     45,529,446
                                                                      9,646,948
                                                                       0.027220
                                                                       0.026354
                                      60
Combination Trucks
Class 8-13
                                                                     80,604,393
                                                                      7,649,937
                                                                       0.048191
                                                                       0.020898
                                       
Total
 
                                                                  1,672,617,919
                                                                    366,053,266
                                                                       1.000000
                                                                       1.000000
                                       
                                       
                                       
                Table 3  -  GDOT Vehicle Classification Counts
                     Statewide minus 13-County Atlanta MPO
                                       
                                       
                                       

          Table 3 (continued)  -  GDOT Vehicle Classification Counts 
                     Statewide minus 13-County Atlanta MPO
                                       

         Table 4  -  Final Factor of VMT by Vehicle Type by Road Type
                                 7-County Area
                                       
Code
HPMS Vehicle Type
FHWA Veh Class
 Restricted Access 
 Unrestricted Access 
 Restricted Access Factor
 Unrestricted Access  Factor
                                      10
Motorcycles
Class 1
                                                                      3,514,125
                                                                      2,144,654
                                                                       0.003065
                                                                       0.003113
                                      20
Passenger Cars
Class 2
                                                                    715,292,864
                                                                    477,981,491
                                                                       0.623953
                                                                       0.693753
                                      30
Other 2 axle-4 tire vehicles
Class 3
                                                                    203,388,778
                                                                    148,122,556
                                                                       0.177417
                                                                       0.214988
                                      40
Buses
Class 4
                                                                      8,571,093
                                                                      3,259,964
                                                                       0.007477
                                                                       0.004732
                                      50
Single Unit Trucks
Class 5-7
                                                                     37,734,334
                                                                     23,832,760
                                                                       0.032916
                                                                       0.034591
                                      60
Combination Trucks
Class 8-13
                                                                    177,888,021
                                                                     33,638,415
                                                                       0.155172
                                                                       0.048824
                                       
Total
 
                                                                  1,146,389,215
                                                                    688,979,840
                                                                       1.000000
                                                                       1.000000

Since the vehicle classification counts are collected using counters that do not adequately distinguish between passenger cars and SUVs, the MOVES defaults for vehicle types 20 and 30 by road type were used to redistribute the VMT.  The MOVES Defaults are listed in Table 5.
             Table 5  -  MOVES Default Percent VMT by Vehicle Type
                                       
                                       
                                 Vehicle Type
                                     Year
                                      10
                                      20
                                      30
                                      40
                                      50
                                      60
                                     1999
                                                                        0.00390
                                                                        0.58310
                                                                        0.33480
                                                                        0.00280
                                                                        0.02610
                                                                        0.04920
                                     2000
                                                                        0.00380
                                                                        0.58250
                                                                        0.33600
                                                                        0.00280
                                                                        0.02570
                                                                        0.04920
                                     2001
                                                                        0.00340
                                                                        0.58240
                                                                        0.33740
                                                                        0.00250
                                                                        0.02590
                                                                        0.04850
                                     2002
                                                                        0.00330
                                                                        0.58110
                                                                        0.33850
                                                                        0.00240
                                                                        0.02660
                                                                        0.04820
                                     2003
                                                                        0.00330
                                                                        0.57880
                                                                        0.34060
                                                                        0.00230
                                                                        0.02690
                                                                        0.04810
                                     2004
                                                                        0.00340
                                                                        0.57260
                                                                        0.34600
                                                                        0.00220
                                                                        0.02730
                                                                        0.04850
                                     2005
                                                                        0.00360
                                                                        0.57060
                                                                        0.34770
                                                                        0.00220
                                                                        0.02710
                                                                        0.04870
                                     2006
                                                                        0.00400
                                                                        0.55990
                                                                        0.35850
                                                                        0.00220
                                                                        0.02750
                                                                        0.04780
                                     2007
                                                                        0.00450
                                                                        0.55070
                                                                        0.36630
                                                                        0.00220
                                                                        0.02790
                                                                        0.04840
                                     2008
                                                                        0.00510
                                                                        0.54610
                                                                        0.36980
                                                                        0.00230
                                                                        0.02870
                                                                        0.04800
                                     2009
                                                                        0.00530
                                                                        0.54760
                                                                        0.37480
                                                                        0.00210
                                                                        0.02660
                                                                        0.04370
                                     2010
                                                                        0.00530
                                                                        0.54360
                                                                        0.37770
                                                                        0.00220
                                                                        0.02770
                                                                        0.04350
                                     2011
                                                                        0.00530
                                                                        0.53940
                                                                        0.37830
                                                                        0.00240
                                                                        0.02970
                                                                        0.04500
                                     2012
                                                                        0.00530
                                                                        0.53700
                                                                        0.37740
                                                                        0.00250
                                                                        0.03140
                                                                        0.04640
                                     2013
                                                                        0.00520
                                                                        0.53640
                                                                        0.37610
                                                                        0.00260
                                                                        0.03240
                                                                        0.04730
                                     2014
                                                                        0.00520
                                                                        0.53780
                                                                        0.37370
                                                                        0.00260
                                                                        0.03310
                                                                        0.04760
                                     2015
                                                                        0.00511
                                                                        0.54185
                                                                        0.36926
                                                                        0.00266
                                                                        0.03358
                                                                        0.04754
                                     2016
                                                                        0.00505
                                                                        0.54655
                                                                        0.36414
                                                                        0.00270
                                                                        0.03413
                                                                        0.04743
                                     2017
                                                                        0.00500
                                                                        0.55148
                                                                        0.35868
                                                                        0.00274
                                                                        0.03465
                                                                        0.04744
                                     2018
                                                                        0.00495
                                                                        0.55719
                                                                        0.35240
                                                                        0.00278
                                                                        0.03509
                                                                        0.04759
                                     2019
                                                                        0.00490
                                                                        0.56346
                                                                        0.34559
                                                                        0.00281
                                                                        0.03548
                                                                        0.04777
                                     2020
                                                                        0.00484
                                                                        0.57033
                                                                        0.33840
                                                                        0.00283
                                                                        0.03581
                                                                        0.04779
                                     2021
                                                                        0.00479
                                                                        0.57743
                                                                        0.33138
                                                                        0.00285
                                                                        0.03599
                                                                        0.04755
                                     2022
                                                                        0.00475
                                                                        0.58459
                                                                        0.32444
                                                                        0.00286
                                                                        0.03613
                                                                        0.04723
                                     2023
                                                                        0.00471
                                                                        0.59142
                                                                        0.31755
                                                                        0.00288
                                                                        0.03639
                                                                        0.04705
                                     2024
                                                                        0.00466
                                                                        0.59782
                                                                        0.31089
                                                                        0.00291
                                                                        0.03674
                                                                        0.04698
                                     2025
                                                                        0.00462
                                                                        0.60374
                                                                        0.30470
                                                                        0.00294
                                                                        0.03709
                                                                        0.04692
                                     2026
                                                                        0.00458
                                                                        0.60921
                                                                        0.29896
                                                                        0.00296
                                                                        0.03745
                                                                        0.04684
                                     2027
                                                                        0.00455
                                                                        0.61410
                                                                        0.29377
                                                                        0.00300
                                                                        0.03784
                                                                        0.04674
                                     2028
                                                                        0.00452
                                                                        0.61852
                                                                        0.28903
                                                                        0.00303
                                                                        0.03828
                                                                        0.04662
                                     2029
                                                                        0.00450
                                                                        0.62265
                                                                        0.28449
                                                                        0.00307
                                                                        0.03876
                                                                        0.04652
                                     2030
                                                                        0.00448
                                                                        0.62625
                                                                        0.28038
                                                                        0.00311
                                                                        0.03930
                                                                        0.04648
                                     2031
                                                                        0.00444
                                                                        0.62984
                                                                        0.27688
                                                                        0.00313
                                                                        0.03959
                                                                        0.04611
                                     2032
                                                                        0.00440
                                                                        0.63303
                                                                        0.27380
                                                                        0.00316
                                                                        0.03987
                                                                        0.04574
                                     2033
                                                                        0.00436
                                                                        0.63573
                                                                        0.27104
                                                                        0.00319
                                                                        0.04023
                                                                        0.04545
                                     2034
                                                                        0.00432
                                                                        0.63812
                                                                        0.26857
                                                                        0.00321
                                                                        0.04058
                                                                        0.04519
                                     2035
                                                                        0.00429
                                                                        0.64015
                                                                        0.26636
                                                                        0.00324
                                                                        0.04096
                                                                        0.04501
                                     2036
                                                                        0.00425
                                                                        0.64184
                                                                        0.26447
                                                                        0.00327
                                                                        0.04134
                                                                        0.04483
                                     2037
                                                                        0.00421
                                                                        0.64323
                                                                        0.26287
                                                                        0.00330
                                                                        0.04173
                                                                        0.04465
                                     2038
                                                                        0.00418
                                                                        0.64417
                                                                        0.26173
                                                                        0.00333
                                                                        0.04211
                                                                        0.04447
                                     2039
                                                                        0.00414
                                                                        0.64476
                                                                        0.26096
                                                                        0.00336
                                                                        0.04249
                                                                        0.04428
                                     2040
                                                                        0.00411
                                                                        0.64532
                                                                        0.26017
                                                                        0.00340
                                                                        0.04289
                                                                        0.04411
                                     2041
                                                                        0.00407
                                                                        0.64586
                                                                        0.25937
                                                                        0.00343
                                                                        0.04331
                                                                        0.04396
                                     2042
                                                                        0.00404
                                                                        0.64630
                                                                        0.25864
                                                                        0.00346
                                                                        0.04374
                                                                        0.04381
                                     2043
                                                                        0.00401
                                                                        0.64666
                                                                        0.25799
                                                                        0.00350
                                                                        0.04418
                                                                        0.04366
                                     2044
                                                                        0.00398
                                                                        0.64693
                                                                        0.25741
                                                                        0.00353
                                                                        0.04462
                                                                        0.04352
                                     2045
                                                                        0.00395
                                                                        0.64711
                                                                        0.25692
                                                                        0.00357
                                                                        0.04507
                                                                        0.04338
                                     2046
                                                                        0.00392
                                                                        0.64719
                                                                        0.25653
                                                                        0.00360
                                                                        0.04552
                                                                        0.04324
                                     2047
                                                                        0.00389
                                                                        0.64720
                                                                        0.25620
                                                                        0.00364
                                                                        0.04598
                                                                        0.04310
                                     2048
                                                                        0.00386
                                                                        0.64715
                                                                        0.25593
                                                                        0.00368
                                                                        0.04643
                                                                        0.04295
                                     2049
                                                                        0.00383
                                                                        0.64704
                                                                        0.25572
                                                                        0.00371
                                                                        0.04690
                                                                        0.04281
                                     2050
                                                                        0.00380
                                                                        0.64689
                                                                        0.25554
                                                                        0.00375
                                                                        0.04736
                                                                        0.04266