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 20101

.

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.

                                                            

1 Guidance for the Functional Classification of Highways (updated), Federal Highway Administration,

October 14, 2008
Table 1 – GDOT Vehicle Classification Counts

13‐County Atlanta MPO

2008 13 County Atlanta MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

UrbanRestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 16,858 184,014 1,321,610 154,567 0.2% 0.4% 

20 Passenger Cars Class 2 5,033,881 33,440,176 441,682,775 62,560,573 63.1% 70.0% 

30 Other 2 axle‐4 tire vehicles Class 3 1,589,435 8,589,583 94,611,416 12,979,814 19.9% 18.0% 

40 Buses Class 4 61,002 347,125 4,273,934 596,264 0.8% 0.7% 

50 Single Unit Trucks Class 5‐7 323,988 1,948,590 18,577,894 2,159,833 4.1% 4.1% 

60 Combination Trucks Class 8‐13 952,385 3,242,388 31,896,705 759,298 11.9% 6.8% 

Total 7,977,549 47,751,876 592,364,334 79,210,349 100% 100% 

2009 13 County Atlanta MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

UrbanRestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 51,352 101,595 1,540,072 240,506 0.2% 0.2% 20 Passenger Cars Class 2 15,065,261 40,708,739 573,832,909 98,353,063 65.0% 74.0% 

30 Other 2 axle‐4 tire vehicles Class 3 4,297,018 9,664,212 119,721,238 20,115,480 18.5% 17.6% 

40 Buses Class 4 162,864 365,145 4,755,365 733,635 0.7% 0.7% 50 Single Unit Trucks Class 5‐7 778,609 1,744,325 21,464,577 3,043,483 3.4% 3.2% 

60 Combination Trucks Class 8‐13 2,831,994 2,402,216 36,457,015 957,240 12.2% 4.4% 

23,187,098 54,986,232 757,771,176 123,443,407 100% 100% 

Code HPMS Vehicle Type

FHWAVeh Class

Weekday Counts Percent by 

Weekday Counts Percent by 

Code HPMS Vehicle Type

FHWAVeh Class
Table 1 (continued) – GDOT Vehicle Classification Counts

13‐County Atlanta MPO

2010 13 County Atlanta MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

UrbanRestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 12,376 36,254 710,183 121,758 0.3% 0.2% 

20 Passenger Cars Class 2 3,072,873 14,347,044 232,240,678 36,234,722 76.0% 81.9% 

30 Other 2 axle‐4 tire vehicles Class 3 702,918 2,691,501 40,925,619 6,029,282 17.4% 15.4% 

40 Buses Class 4 11,738 45,390 790,705 115,939 0.3% 0.3% 

50 Single Unit Trucks Class 5‐7 71,303 251,025 4,313,075 499,692 1.8% 1.4% 

60 Combination Trucks Class 8‐13 170,081 157,197 8,296,213 131,598 4.2% 0.9% 

Total 4,041,289 17,528,411 287,276,473 43,132,991 100% 100% 

2008‐2010 13 County Atlanta MPO Area Summary

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

UrbanRestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 80,586 321,863 3,571,865 516,831 0.2% 0.3% 20 Passenger Cars Class 2 23,172,015 88,495,959 1,247,756,362 197,148,358 65.8% 73.6% 

30 Other 2 axle‐4 tire vehicles Class 3 6,589,371 20,945,296 255,258,273 39,124,576 18.7% 17.4% 

40 Buses Class 4 235,604 757,660 9,820,004 1,445,838 0.7% 0.6% 

50 Single Unit Trucks Class 5‐7 1,173,900 3,943,940 44,355,546 5,703,008 3.3% 3.3% 60 Combination Trucks Class 8‐13 3,954,460 5,801,801 76,649,933 1,848,136 11.2% 4.8% 

Total 35,205,936 120,266,519 1,637,411,983 245,786,747 100% 100% 

Weekday Counts Percent by 

Code HPMS Vehicle Type

FHWAVeh Class

Weekday Counts Percent by 

Code HPMS Vehicle Type

FHWAVeh Class
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 

10 Motorcycles Class 1 3,652,451 838,694 0.002184 20 Passenger Cars Class 2 1,270,928,377 285,644,317 0.759844 30 Other 2 axle-4 tire vehicles Class 3 261,847,644 60,069,872 0.156550 40 Buses Class 4 10,055,608 2,203,498 0.006012 50 Single Unit Trucks Class 5-7 45,529,446 9,646,948 0.027220 60 Combination Trucks Class 8-13 80,604,393 7,649,937 0.048191 

 Total 1,672,617,919 366,053,266 1.000000 
Table 3 – GDOT Vehicle Classification Counts

Statewide minus 13‐County Atlanta MPO

2008 Statewide minus ARC 13 County MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

Urban

RestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 415,477 276,557 703,762 273,810 0.3% 0.4% 

20 Passenger Cars Class 2 78,146,859 45,813,738 134,370,835 70,721,022 55.0% 64.5% 

30 Other 2 axle‐4 tire vehicles Class 3 23,048,320 16,181,222 37,536,241 19,040,830 16.2% 22.8% 

40 Buses Class 4 1,348,962 412,115 1,464,298 372,563 0.9% 0.6% 

50 Single Unit Trucks Class 5‐7 5,177,758 3,054,596 6,643,091 2,735,728 3.6% 4.3% 

60 Combination Trucks Class 8‐13 33,983,937 5,320,479 24,746,197 1,724,995 23.9% 7.5% 

142,121,313 71,058,707 205,464,424 94,868,948 100% 100% 

2009 Statewide minus ARC 13 County MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

Urban

RestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 543,569 380,461 552,296 334,712 0.3% 0.3% 

20 Passenger Cars Class 2 99,860,922 74,033,369 123,617,071 92,974,090 57.6% 65.0% 

30 Other 2 axle‐4 tire vehicles Class 3 29,013,174 25,257,242 35,153,989 26,580,997 16.7% 22.2% 

40 Buses Class 4 1,445,231 636,498 1,260,763 480,718 0.8% 0.6% 

50 Single Unit Trucks Class 5‐7 5,931,816 4,577,695 5,977,298 3,774,967 3.4% 4.0% 

60 Combination Trucks Class 8‐13 36,572,792 9,058,107 19,363,526 2,566,080 21.1% 7.9% 

173,367,504 113,943,372 185,924,943 126,711,564 100% 100% 

Weekday Counts Percent by 

Code HPMS Vehicle Type

FHWAVeh Class

Code HPMS Vehicle Type

FHWAVeh Class

Weekday Counts Percent by 
Table 3 (continued) – GDOT Vehicle Classification Counts

Statewide minus 13‐County Atlanta MPO

2010 Statewide minus ARC 13 County MPO Area

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

Urban

RestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 531,781 465,637 767,240 413,477 0.3% 0.3% 

20 Passenger Cars Class 2 115,785,383 90,783,273 163,511,794 103,655,999 58.1% 64.4% 

30 Other 2 axle‐4 tire vehicles Class 3 33,029,619 31,077,060 45,607,435 29,985,205 16.6% 22.1% 

40 Buses Class 4 1,648,242 837,435 1,403,597 520,635 0.8% 0.6% 

50 Single Unit Trucks Class 5‐7 6,527,272 5,527,587 7,477,099 4,162,187 3.3% 3.9% 

60 Combination Trucks Class 8‐13 41,728,831 12,222,357 21,492,738 2,746,397 20.9% 8.7% 

Total 199,251,128 140,913,349 240,259,903 141,483,900 100% 100% 

2008‐2010 Statewide minus ARC 13 County MPO Area Summary

RuralRestrictedAccess (FC=1)

RuralUnrestrictedAccess(FC=2‐7)

Urban

RestrictedAccess(FC=11‐12)

UrbanUnrestrictedAccess(FC=14‐19)

RuralRestrictedAccess(FC=1)

RuralUnrestrictedAccess(FC=2‐7)

10 Motorcycles Class 1 1,490,827 1,122,655 2,023,298 1,021,999 0.3% 0.3% 

20 Passenger Cars Class 2 293,793,164 210,630,380 421,499,700 267,351,111 57.7% 67.7% 

30 Other 2 axle‐4 tire vehicles Class 3 85,091,113 72,515,524 118,297,665 75,607,032 16.7% 20.7% 

40 Buses Class 4 4,442,435 1,886,048 4,128,658 1,373,916 0.9% 0.6% 

50 Single Unit Trucks Class 5‐7 17,636,846 13,159,878 20,097,488 10,672,882 3.4% 3.8% 

60 Combination Trucks Class 8‐13 112,285,560 26,600,943 65,602,461 7,037,472 21.0% 6.9% 

Total 514,739,945 325,915,428 631,649,270 363,064,412 100% 100% 

Code HPMS Vehicle Type

FHWAVeh Class

Weekday Counts Percent by 

Code HPMS Vehicle Type

FHWAVeh Class

Weekday Counts Percent by 
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

F

10 Motorcycles Class 1 3,514,125 2,144,654 0.003065 20 Passenger Cars Class 2 715,292,864 477,981,491 0.623953 30 Other 2 axle‐4 tire vehicles Class 3 203,388,778 148,122,556 0.177417 40 Buses Class 4 8,571,093 3,259,964 0.007477 50 Single Unit Trucks Class 5‐7 37,734,334 23,832,760 0.032916 60 Combination Trucks Class 8‐13 177,888,021 33,638,415 0.155172 

Total 1,146,389,215 688,979,840 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
Vehicle Type

Year 10 20 30 40 50 60

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
Vehicle Type

Year 10 20 30 40 50 60

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