LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements (2024)
Chapter: Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)
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Appendix E: Season Definition by SMP Section
Next Chapter: Appendix G: PMED Inputs
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
APPENDIX F
Subgrade Seasonal Adjustment Factor (AASHTO 1993)
| State | LTPP Section No. | Season | |||
|---|---|---|---|---|---|
| Spring | Summer | Fall | Winter | ||
| Alabama | 01-0101 | 1.05 | 1.00 | 1.03 | 1.07 |
| 01-0102 | 0.95 | 1.00 | 1.17 | 1.12 | |
| Arizona | 04-0113 | 0.94 | 1.00 | 0.96 | 1.02 |
| 04-0114 | 0.90 | 1.00 | 0.89 | 0.99 | |
| 04-0215 | 1.03 | 1.00 | 1.05 | 1.03 | |
| 04-1024 | 0.97 | 1.00 | 1.03 | 1.08 | |
| California | 06-3042 | 1.02 | 1.00 | 1.06 | 1.05 |
| Colorado | 08-1053 | 0.95 | 1.00 | 0.93 | 0.92 |
| Connecticut | 09-1803 | 0.79 | 1.00 | 0.96 | 0.93 |
| Delaware | 10-0102 | 0.84 | 1.00 | 1.13 | 1.00 |
| Georgia | 13-1005 | 0.87 | 1.00 | 0.95 | 0.85 |
| 13-1031 | 0.98 | 1.00 | 1.06 | 1.02 | |
| 13-3019 | 0.93 | 1.00 | 1.12 | 1.01 | |
| Idaho | 16-1010 | 0.97 | 1.00 | 1.02 | 1.60 |
| Indiana | 18-3002 | 1.08 | 1.00 | 1.13 | 1.17 |
| Kansas | 20-4054 | 1.05 | 1.00 | 1.05 | 1.04 |
| Maine | 23-1026 | 0.89 | 1.00 | 0.86 | 1.90 |
| Manitoba | 83-1801 | 2.34 | 1.00 | 1.11 | 4.31 |
| 83-3802 | 2.02 | 1.00 | 1.06 | 3.90 | |
| Maryland | 24-1634 | 0.78 | 1.00 | 0.86 | 0.76 |
| Massachusetts | 25-1002 | 0.91 | 1.00 | 0.95 | 1.05 |
| Minnesota | 27-1018 | 1.31 | 1.00 | 0.92 | 3.79 |
| 27-1028 | 1.34 | 1.00 | 0.92 | 2.61 | |
| 27-4040 | 1.83 | 1.00 | 1.07 | 4.23 | |
| 27-6251 | 1.24 | 1.00 | 0.91 | 2.45 | |
| Mississippi | 28-1016 | 1.01 | 1.00 | 1.06 | 1.03 |
| 28-1802 | 0.88 | 1.00 | 0.95 | 0.82 | |
| Montana | 30-0114 | 0.96 | 1.00 | 1.05 | 1.19 |
| 30-8129 | 1.05 | 1.00 | 0.99 | 2.29 | |
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
| State | LTPP Section No. | Season | |||
|---|---|---|---|---|---|
| Spring | Summer | Fall | Winter | ||
| Nebraska | 31-0114 | 1.14 | 1.00 | 1.11 | 1.56 |
| 31-3018 | 0.99 | 1.00 | 0.98 | 1.10 | |
| Nevada | 32-0101 | 1.14 | 1.00 | 1.09 | 1.25 |
| 32-0204 | 1.00 | 1.00 | 0.91 | 1.01 | |
| New Hampshire | 33-1001 | 0.88 | 1.00 | 0.91 | 1.28 |
| New Jersey | 34-0501 | 1.03 | 1.00 | 1.12 | 1.07 |
| 34-0502 | 0.82 | 1.00 | 0.89 | 0.70 | |
| 34-0503 | 0.89 | 1.00 | 0.98 | 0.98 | |
| 34-0504 | 0.89 | 1.00 | 1.03 | 1.00 | |
| 34-0505 | 0.94 | 1.00 | 1.06 | 0.98 | |
| 34-0506 | 0.99 | 1.00 | 1.09 | 1.11 | |
| 34-0507 | 0.94 | 1.00 | 1.07 | 1.15 | |
| 34-0508 | 0.95 | 1.00 | 1.11 | 1.08 | |
| 34-0509 | 0.97 | 1.00 | 1.06 | 1.04 | |
| 34-0559 | 1.00 | 1.00 | 1.12 | 1.07 | |
| 34-0560 | 0.89 | 1.00 | 0.99 | 0.82 | |
| New Mexico | 35-1112 | 1.01 | 1.00 | 0.92 | 0.90 |
| New York | 36-0801 | 0.86 | 1.00 | 1.08 | 1.17 |
| 36-4018 | 0.94 | 1.00 | 1.04 | 1.50 | |
| North Carolina | 37-0201 | 1.04 | 1.00 | 0.94 | 1.09 |
| Ohio | 39-0204 | 0.98 | 1.00 | 0.95 | 0.97 |
| 39-0901 | 1.04 | 1.00 | 1.10 | 1.14 | |
| Oklahoma | 40-4165 | 0.99 | 1.00 | 1.07 | 1.06 |
| Ontario | 87-1622 | 0.90 | 1.00 | 0.93 | 1.67 |
| Pennsylvania | 42-1606 | 0.90 | 1.00 | 0.98 | 1.03 |
| Quebec | 89-3015 | 1.16 | 1.00 | 1.12 | 2.31 |
| Saskatchewan | 90-6405 | 1.58 | 1.00 | 1.13 | 4.68 |
| South Dakota | 46-0804 | 1.20 | 1.00 | 1.12 | 2.20 |
| 46-3010 | 0.95 | 1.00 | 1.06 | — | |
| 46-9187 | 1.16 | 1.00 | 1.23 | 1.54 | |
| Texas | 48-1060 | 1.01 | 1.00 | 1.03 | 1.05 |
| 48-1068 | 1.01 | 1.00 | 1.07 | 1.09 | |
| 48-1077 | 0.93 | 1.00 | 0.93 | 0.84 | |
| 48-1122 | 0.97 | 1.00 | 1.06 | 1.04 | |
| 48-3739 | 0.97 | 1.00 | 1.01 | 1.01 | |
| 48-4142 | 0.88 | 1.00 | 0.96 | 0.92 | |
| 48-4143 | 0.98 | 1.00 | 1.00 | 1.02 | |
| Utah | 49-1001 | 0.96 | 1.00 | 0.94 | 0.96 |
| 49-3011 | 1.11 | 1.00 | 1.08 | 1.12 | |
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
| State | LTPP Section No. | Season | |||
|---|---|---|---|---|---|
| Spring | Summer | Fall | Winter | ||
| Vermont | 50-1002 | 1.04 | 1.00 | 1.02 | 1.10 |
| Virginia | 51-0113 | 1.01 | 1.00 | 1.07 | 1.05 |
| 51-0114 | 0.99 | 1.00 | 0.95 | 1.05 | |
| Washington | 53-3813 | 0.83 | 1.00 | 1.16 | 1.05 |
| Wyoming | 56-1007 | 0.90 | 1.00 | 0.93 | 1.28 |
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
Suggested Citation:
"Appendix F: Subgrade Seasonal Adjustment Factor (AASHTO 1993)." National Academies of Sciences, Engineering, and Medicine. 2024. LTPP Data Analysis: Improving Use of FWD and Longitudinal Profile Measurements. Washington, DC: The National Academies Press.
doi: 10.17226/28570.
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