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Publication Number:  FHWA-HRT-15-036    Date:  December 2015
Publication Number: FHWA-HRT-15-036
Date: December 2015

 

Long-Term Pavement Performance Program Determination of In-Place Elastic Layer Modulus: Backcalculation Methodology and Procedures

Appendix B: LTPP Test Sections with a Moderate and High Percentage of Errors

This appendix lists the LTPP test sections with a moderate and high percentage of errors from the backcalculation process. Table 19 includes the sections with a moderate percentage of error terms of the total number of deflection basins, while table 20 includes the sections with a high percentage of error terms. The deflection basins classified as errors for the test sections included in these tables represent only 9.6 percent of the total number of deflection basins.

Table 19. LTPP test sections with a moderate percentage of errors.d
State Code SHRP ID Total Drops Error Drops Atypical Drops Accept Drops Percent Error
1 663 1,714 649 0 1,065 37.9
1 607 1,832 610 0 1,222 33.3
1 B330 720 208 51 461 28.9
1 508 3,697 993 326 2,378 26.9
1 C320 1,043 268 32 743 25.7
2 1008 2,680 1,151 238 1,291 42.9
2 6010 2,344 705 157 1,482 30.1
2 1002 5,686 1,508 494 3,684 26.5
4 1036 4,103 1,910 8 2,185 46.6
4 163 1,965 852 98 1,015 43.4
4 A310 789 341 1 447 43.2
4 217 961 408 39 514 42.5
4 A320 837 345 4 488 41.2
4 1015 3,381 1,363 114 1,904 40.3
4 C340 792 318 1 473 40.2
4 B320 528 199 2 327 37.7
4 1001 2,018 739 133 1,146 36.6
4 1037 2,688 962 8 1,718 35.8
4 1034 4,028 1,391 1 2,636 34.5
4 1025 4,192 1,404 374 2,414 33.5
4 503 3,462 1,139 20 2,303 32.9
4 1018 4,928 1,519 5 3,404 30.8
4 C330 936 286 10 640 30.6
4 A903 2,103 601 88 1,414 28.6
4 666 1,718 466 1 1,251 27.1
4 1016 6,208 1,653 148 4,407 26.6
4 1017 7,388 1,957 69 5,362 26.5
4 903 2,112 554 96 1,462 26.2
5 A350 1,077 501 30 546 46.5
5 A320 1,109 500 43 566 45.1
5 218 555 143 0 412 25.8
6 3021 1,164 490 251 423 42.1
6 9048 974 392 0 582 40.2
6 A361 915 350 11 554 38.3
6 605 565 214 15 336 37.9
6 662 809 290 64 455 35.8
6 A363 845 300 43 502 35.5
6 A340 1,189 419 59 711 35.2
6 3005 636 220 0 416 34.6
6 663 723 245 0 478 33.9
6 661 2,348 780 277 1291 33.2
6 A351 1,027 315 103 609 30.7
6 A362 789 241 44 504 30.5
6 501 2,579 780 248 1,551 30.2
6 1253 4,777 1,444 220 3,113 30.2
6 603 2,148 640 47 1,461 29.8
6 A350 1,209 353 50 806 29.2
6 A320 1,196 338 68 790 28.3
6 A310 1,187 333 72 782 28.1
6 A352 829 232 73 524 28.0
6 502 2,956 817 220 1,919 27.6
6 A321 1,055 272 67 716 25.8
8 9020 802 396 0 406 49.4
8 9019 647 303 0 344 46.8
8 7781 4,719 2,165 0 2,554 45.9
8 6013 3,392 1,493 0 1,899 44.0
8 501 2,312 893 17 1,402 38.6
8 560 2,112 755 52 1,305 35.7
8 508 2,252 778 174 1,300 34.5
8 B310 648 216 0 432 33.3
8 507 2,295 754 101 1,440 32.9
8 3032 1,520 496 3 1,021 32.6
8 7036 982 320 186 476 32.6
8 1029 4,711 1,481 216 3,014 31.4
8 6002 4,672 1,407 337 2,928 30.1
8 214 819 240 111 468 29.3
12 C330 951 469 18 464 49.3
12 4107 2,047 883 19 1,145 43.1
12 4137 3,364 1,227 13 2,124 36.5
12 4136 3,344 1,165 16 2,163 34.8
12 C320 942 318 16 608 33.8
12 4109 1,082 325 9 748 30.0
12 C350 758 221 34 503 29.2
12 9054 2,176 588 27 1,561 27.0
12 C310 956 249 43 664 26.0
13 4093 3,356 1,047 423 1,886 31.2
16 B350 936 382 113 441 40.8
16 1021 3,723 1,430 560 1,733 38.4
16 B310 936 330 179 427 35.3
16 1009 2,364 673 511 1,180 28.5
16 C330 504 133 88 283 26.4
16 9034 3,387 849 607 1,931 25.1
17 5217 1,275 500 35 740 39.2
17 9327 2,182 554 232 1,396 25.4
18 6012 5,294 1,796 484 3,014 33.9
18 1028 5023 1,343 344 3,336 26.7
19 102 2461 1,080 610 771 43.9
19 105 2,475 694 278 1,503 28.0
19 709 216 60 76 80 27.8
20 A330 874 411 120 343 47.0
20 A320 926 423 130 373 45.7
20 105 3,140 1,141 195 1,804 36.3
20 102 720 250 32 438 34.7
20 B320 1,337 414 38 885 31.0
20 4063 888 255 0 633 28.7
20 108 2,956 847 360 1,749 28.7
20 109 3,330 920 171 2,239 27.6
20 3060 884 235 59 590 26.6
20 111 3,128 792 333 2,003 25.3
21 B320 1,059 471 3 585 44.5
21 B310 1,096 433 0 663 39.5
24 2805 5,360 2,168 1 3,191 40.4
24 961 1,230 412 0 818 33.5
24 960 1,350 448 0 902 33.2
24 901 1,261 406 0 855 32.2
24 903 1,363 387 0 976 28.4
26 6016 1,406 607 674 125 43.2
26 116 3,429 980 1,596 853 28.6
26 118 2,400 638 695 1,067 26.6
27 B330 960 417 214 329 43.4
27 1004 2,878 1,224 1 1,653 42.5
27 502 692 242 78 372 35.0
27 A330 1,088 363 230 495 33.4
27 D340 910 291 281 338 32.0
27 1020 2,653 755 783 1,115 28.5
27 508 3,515 914 707 1,894 26.0
27 C340 927 238 23 666 25.7
27 561 3,550 897 295 2,358 25.3
28 3083 3,998 1,745 453 1,800 43.6
28 503 2,800 722 317 1,761 25.8
28 504 2,326 583 341 1,402 25.1
29 507 1,038 509 169 360 49.0
29 501 687 290 146 251 42.2
29 502 1,056 411 169 476 38.9
29 503 1,040 393 143 504 37.8
29 5473 2,578 947 6 1,625 36.7
29 707 742 269 13 460 36.3
29 A351 1,310 435 282 593 33.2
29 607 429 140 0 289 32.6
29 7054 2,678 829 6 1,843 31.0
29 1002 3,638 1,021 368 2,249 28.1
29 A340 1,438 399 147 892 27.7
29 504 1,392 367 358 667 26.4
29 6067 1,351 350 98 903 25.9
30 6004 3,372 1,204 210 1,958 35.7
30 1001 3,520 1,175 70 2,275 33.4
30 7075 2,700 901 232 1,567 33.4
30 A320 864 224 44 596 25.9
30 A310 864 223 35 606 25.8
31 6701 654 293 0 361 44.8
31 7040 1,927 825 416 686 42.8
31 6702 1,961 788 9 1,164 40.2
31 A352 752 227 0 525 30.2
31 A310 877 223 3 651 25.4
31 A350 956 243 33 680 25.4
31 A320 972 244 49 679 25.1
32 A352 408 196 30 182 48.0
32 7000 2,047 892 0 1,155 43.6
32 1021 2,388 1,024 26 1,338 42.9
32 2027 2,064 714 273 1,077 34.6
32 3013 693 220 1 472 31.7
32 A320 1,032 312 5 715 30.2
32 A330 1,020 283 49 688 27.7
32 1030 2,704 730 567 1,407 27.0
32 B320 648 172 36 440 26.5
35 111 1,752 771 534 447 44.0
35 901 944 359 77 508 38.0
35 959 1,072 370 43 659 34.5
35 902 1,072 357 115 600 33.3
35 903 1,072 357 81 634 33.3
35 501 1,408 450 4 954 32.0
35 6033 4,048 1,154 111 2,783 28.5
35 1002 2,704 737 64 1,903 27.3
35 502 2,107 534 198 1,375 25.3
35 802 1,752 442 53 1,257 25.2
37 901 1,055 467 212 376 44.3
37 1817 6,013 2,512 0 3,501 41.8
37 960 1,056 371 166 519 35.1
37 962 1,056 367 38 651 34.8
37 964 1,048 344 281 423 32.8
37 961 1,067 344 2 721 32.2
37 902 1,050 314 70 666 29.9
37 963 1,056 274 138 644 25.9
39 105 1,517 584 255 678 38.5
40 118 2,117 1,039 103 975 49.1
40 503 2,143 1,038 60 1,045 48.4
40 560 2,112 998 2 1,112 47.3
40 506 2,112 977 89 1,046 46.3
40 502 2,112 961 46 1,105 45.5
40 117 2,112 955 172 985 45.2
40 B350 768 344 0 424 44.8
40 4088 1,952 809 1 1,142 41.4
40 114 2,030 775 155 1,100 38.2
40 C310 1,152 437 0 715 37.9
40 B310 752 265 0 487 35.2
40 121 2,108 725 0 1,383 34.4
40 4164 2,704 896 906 902 33.1
40 B330 768 239 0 529 31.1
40 C320 1,152 339 0 813 29.4
40 C330 1,147 329 0 818 28.7
40 120 2,112 586 442 1,084 27.7
40 7024 2,655 666 1,106 883 25.1
40 504 2,112 528 30 1,554 25.0
42 1599 4,608 2,108 164 2,336 45.7
42 B340 1,269 396 132 741 31.2
42 1627 1,186 313 85 788 26.4
45 1011 2,048 746 105 1,197 36.4
46 859 458 214 8 236 46.7
47 3104 2,143 882 105 1,156 41.2
47 3108 3,945 1,621 0 2,324 41.1
47 6015 2,720 999 0 1,721 36.7
48 A330 576 267 15 294 46.4
48 3579 1,744 779 1 964 44.7
48 1087 3,391 1,490 68 1,833 43.9
48 K310 960 419 59 482 43.6
48 1122 47,180 1,9345 427 27,408 41.0
48 1 1,325 542 174 609 40.9
48 F340 656 263 24 369 40.1
48 901 1,407 563 43 801 40.0
48 1069 3,768 1,478 766 1,524 39.2
48 A340 576 213 55 308 37.0
48 E340 768 282 0 486 36.7
48 F350 768 277 0 491 36.1
48 J351 764 262 49 453 34.3
48 160 2,430 827 463 1,140 34.0
48 A320 576 187 10 379 32.5
48 F320 768 241 46 481 31.4
48 5035 865 271 0 594 31.3
48 123 2,549 780 606 1,163 30.6
48 1061 704 215 127 362 30.5
48 162 2,463 748 369 1,346 30.4
48 124 1,969 565 161 1,243 28.7
48 L320 960 275 63 622 28.6
48 3865 3,555 1,006 92 2,457 28.3
48 161 2,419 679 131 1,609 28.1
48 121 2,451 683 778 990 27.9
48 A807 742 189 0 553 25.5
48 3679 1,344 340 252 752 25.3
49 B330 786 380 0 406 48.3
49 B390 648 300 0 348 46.3
49 1001 38,092 17,628 993 19,471 46.3
49 B320 360 141 88 131 39.2
49 B350 792 287 1 504 36.2
49 7082 1,206 413 0 793 34.2
49 1008 2,351 755 123 1,473 32.1
49 B331 432 135 1 296 31.3
49 7083 997 307 5 685 30.8
49 7085 1,195 350 4 841 29.3
49 C350 790 225 150 415 28.5
49 C361 648 180 2 466 27.8
49 804 2,094 577 299 1,218 27.6
49 3010 800 215 33 552 26.9
49 1004 4,131 1,067 167 2,897 25.8
51 121 3,830 1,353 246 2,231 35.3
51 A350 859 298 4 557 34.7
51 A320 845 261 171 413 30.9
51 A321 847 220 152 475 26.0
53 1002 2,597 1,019 97 1,481 39.2
53 1005 3,965 1,163 555 2,247 29.3
53 1801 3,501 937 393 2,171 26.8
54 4004 2,983 1,140 115 1,728 38.2
55 113 1,158 471 101 586 40.7
55 115 1,394 529 274 591 37.9
55 120 1,408 491 398 519 34.9
55 121 1,408 461 406 541 32.7
55 117 1,403 414 234 755 29.5
55 B903 1,951 571 146 1,234 29.3
55 B908 1,785 448 80 1,257 25.1
56 6031 2,842 1,242 0 1,600 43.7
56 6029 3,392 1,205 156 2,031 35.5
56 1007 41,739 10,568 1,724 29,447 25.3
72 4121 966 449 0 517 46.5
72 1003 2,717 1,102 99 1,516 40.6
81 508 2,830 1,367 10 1,453 48.3
81 502 2,656 1,060 19 1,577 39.9
81 1804 4,720 1,439 909 2,372 30.5
81 1803 4,047 1,064 56 2,927 26.3
82 9017 2,048 551 264 1,233 26.9
89 903 2,346 700 243 1,403 29.8
90 A340 1,079 468 1 610 43.4
90 A310 762 254 17 491 33.3
90 A320 1,031 310 6 715 30.1
90 A351 1,048 311 9 728 29.7
90 A330 853 216 7 630 25.3
Total number of drops 638,739 221,144 42,268 375,327 30

 

Table 20. LTPP test sections with a high percentage of errors.
State Code SHRP ID Total Drops Error Drops Atypical Drops Accept Drops Percent Error
4 504 3,355 3,318 0 37 98.9
4 507 3,087 2,918 0 169 94.5
4 502 3,857 2,912 46 899 75.5
4 501 1,553 1,035 8 510 66.6
4 508 3,353 2,102 96 1,155 62.7
4 6060 2,059 1,281 29 749 62.2
4 560 3,496 2,149 12 1,335 61.5
4 6054 1,869 1,134 0 735 60.7
4 506 3,878 2,347 27 1,504 60.5
4 A350 619 349 4 266 56.4
4 509 3,895 2,195 43 1,657 56.4
4 505 3,968 2,209 57 1,702 55.7
4 A330 792 428 3 361 54.0
4 1002 2,662 1,421 62 1,179 53.4
4 6055 2,720 1,446 4 1,270 53.2
4 6053 1,376 715 7 654 52.0
4 122 479 246 119 114 51.4
6 A353 719 603 4 112 83.9
6 8156 3,709 2,806 21 882 75.7
6 602 593 427 3 163 72.0
6 7454 3,309 1,991 63 1,255 60.2
6 569 1,882 1,044 9 829 55.5
8 2008 2,894 2,842 0 52 98.2
8 B330 295 222 0 73 75.3
8 B320 640 479 0 161 74.8
8 503 2,256 1,625 1 630 72.0
8 B350 360 254 40 66 70.6
8 509 2,252 1,496 1 755 66.4
8 506 2,281 1,451 2 828 63.6
8 502 2,292 1,418 0 874 61.9
8 505 2,256 1,214 34 1,008 53.8
8 1057 1,392 701 143 548 50.4
12 102 1,751 1,751 0 0 100.0
12 103 1,907 1,907 0 0 100.0
12 105 1,802 1,802 0 0 100.0
12 107 1,881 1,881 0 0 100.0
12 108 1,704 1,704 0 0 100.0
12 161 1,500 1,500 0 0 100.0
12 4103 1,864 1,860 0 4 99.8
12 109 1,792 1,785 0 7 99.6
12 106 1,893 1,881 0 12 99.4
12 110 1,800 1,748 1 51 97.1
12 111 2,016 1,940 2 74 96.2
12 104 1,749 1,640 7 102 93.8
12 101 1,796 1,636 157 3 91.1
12 112 1,873 1,426 2 445 76.1
12 1060 2,032 1,323 7 702 65.1
12 4135 3,316 1,977 67 1,272 59.6
12 4154 2,474 1,442 122 910 58.3
13 4118 1,126 649 0 477 57.6
16 1005 273 273 0 0 100.0
16 6027 1,375 776 41 558 56.4
16 1001 3,248 1,748 3 1,497 53.8
19 6049 1,560 1,481 66 13 94.9
19 1044 3,668 2,166 613 889 59.1
20 107 1,056 1,012 34 10 95.8
20 1006 2,073 1,647 0 426 79.5
20 103 3,123 2,297 355 471 73.6
20 6026 5,239 3,760 129 1,350 71.8
20 106 3,150 1,819 546 785 57.7
20 104 3,064 1,638 524 902 53.5
21 B350 1,045 892 2 151 85.4
21 A320 928 711 0 217 76.6
21 1034 4,940 2,511 0 2,429 50.8
24 962 1,201 782 0 419 65.1
24 902 1,353 743 0 610 54.9
26 1010 3,055 2,601 0 454 85.1
27 6064 3,376 3,316 59 1 98.2
27 2023 2,656 1,555 389 712 58.5
28 3085 3,363 1,895 38 1,430 56.3
29 802 1,401 1,399 0 2 99.9
29 B330 1,454 1,374 4 76 94.5
29 B351 1,470 1,308 3 159 89.0
29 506 1,392 1,046 101 245 75.1
29 508 1,052 642 1 409 61.0
29 1010 1,790 1,090 118 582 60.9
29 706 770 448 0 322 58.2
29 1005 3,687 1,916 265 1,506 52.0
30 7076 4,720 2,499 0 2,221 52.9
31 6700 2,516 1,574 4 938 62.6
32 206 136 68 0 68 50.0
35 105 1,748 1,533 0 215 87.7
35 801 1,758 1,179 35 544 67.1
37 1352 2,679 2,665 14 0 99.5
37 1024 4,182 3,159 6 1,017 75.5
39 159 605 605 0 0 100.0
39 A804 643 431 61 151 67.0
39 A803 455 252 2 201 55.4
39 103 2,032 1,042 406 584 51.3
40 509 2,128 1,684 6 438 79.1
40 1017 1,376 901 0 475 65.5
40 B360 192 121 0 71 63.0
40 6010 2,712 1,604 20 1,088 59.1
40 505 2,112 1,166 1 945 55.2
40 116 2,002 1,032 116 854 51.5
41 7019 1,903 1,137 156 610 59.7
42 A310 864 844 0 20 97.7
42 B350 1,296 1,260 0 36 97.2
42 1597 6,636 5,869 26 741 88.4
42 1618 2,701 2,190 0 511 81.1
42 A351 863 565 1 297 65.5
45 1024 3,684 3,132 13 539 85.0
45 1008 1,314 899 37 378 68.4
47 9025 3,954 3,954 0 0 100.0
47 9024 3,995 3,991 0 4 99.9
47 C350 764 722 0 42 94.5
47 C330 768 721 0 47 93.9
47 C311 576 520 0 56 90.3
47 C310 767 662 0 105 86.3
47 C320 766 658 0 108 85.9
47 1023 5,069 4,224 0 845 83.3
47 3109 3,979 3,294 62 623 82.8
47 1028 4,039 3,135 76 828 77.6
47 A320 806 508 6 292 63.0
47 3101 5,118 2,739 361 2,018 53.5
48 K340 944 944 0 0 100.0
48 1123 2,020 2,013 0 7 99.7
48 K330 835 826 0 9 98.9
48 1168 3,266 3,198 18 50 97.9
48 K351 748 715 0 33 95.6
48 K350 960 840 0 120 87.5
48 A310 576 500 1 75 86.8
48 902 1,301 1,111 1 189 85.4
48 9355 1,232 962 196 74 78.1
48 K320 960 727 3 230 75.7
48 5278 1,141 855 2 284 74.9
48 3855 3,299 2,446 93 760 74.1
48 9005 5,019 3,700 30 1,289 73.7
48 H351 384 238 0 146 62.0
48 1094 2,718 1,656 50 1,012 60.9
48 903 1,396 761 3 632 54.5
48 J310 1,136 584 0 552 51.4
48 3689 3,288 1,678 3 1,607 51.0
49 B352 134 122 5 7 91.0
49 1007 1,360 943 1 416 69.3
49 1005 1,376 722 9 645 52.5
51 1419 4,731 3,937 1 793 83.2
51 1417 5,904 3,375 37 2,492 57.2
53 7322 4,064 2,296 264 1,504 56.5
54 1640 4,640 2,787 517 1,336 60.1
55 114 1,759 1,379 108 272 78.4
55 116 1,405 1,010 156 239 71.9
56 6032 2,478 1,946 64 468 78.5
72 4122 2,717 1,978 1 738 72.8
81 504 2,844 2,070 3 771 72.8
81 503 2,862 1,770 2 1,090 61.8
81 509 2,735 1,643 54 1,038 60.1
85 1801 3,342 2,723 0 619 81.5
88 1646 3,376 1,813 18 1,545 53.7
89 902 1,626 1,494 3 129 91.9
89 901 351 317 18 16 90.3
89 A902 2,332 1,729 0 603 74.1
Total number of drops 330,303 239,823 7,564 82,916 72.6

 

 

 

 

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