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Publication Number: FHWA-HRT-09-039
Date: April 2010

Pavement Marking Demonstration Project: State of Alaska and State of Tennessee-Report to Congress

Appendix D. Pavement Marking Retroreflectivity Degredation Graphs

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This appendix contains graphs showing the retroreflectivity degradation of each test section that lasted at least 1 year. The y-axes on the graphs represent retroreflectivity (mcd/m2/lux), and the x-axes represent the age of the markings in days since application. For more specific marking information, refer to appendix C. Note that the y-axes vary in scale for the different graphs.

Alaska Test Deck

Figure 38. Graph.  Retroreflectivity degradation sections 5 AK a and 5 AK b.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Two trend lines are displayed.  Trend line A (3M 380IES Tape) edge line deep groove has the following values:  19 days-773 mcd/m2/lux, 47 days-869 mcd/m2/lux, 257 days-236 mcd/m2/lux, 341 days-193 mcd/m2/lux, 419 days-166 mcd/m2/lux, 643 days-193 mcd/m2/lux, 727 days-151 mcd/m2d/lux, and 782 days-191 mcd/m2/lux.  Trend line B (3M 380WR-ES Tape) edge line deep groove has the following values:  19 days-526 mcd/m2/lux, 47 days- 562 mcd/m2/lux, 257 days-262 mcd/m2/lux, 341 days-185 mcd/m2/lux, 419 days- 164 mcd/m2/lux, 643 days-165 mcd/m2/lux, 727 days-181 mcd/m2/lux, and 782 days-169 mcd/m2/lux.

Figure 38. Graph. Retroreflectivity degradation sections 5 AK a and 5 AK b.

Nashville, TN, Test Deck

Figure 39.  Graph.  Retroreflectivity degradation section 1 TN-N.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows retroreflectivity level in mcd/m2/lux.  The trend line spray thermo zero mil edge line shallow groove  has the following values:  21 days-390 mcd/m2/lux, 162 days-283 mcd/m2/lux, 231 days-283 mcd/m2/lux, 308 days-241 mcd/m2/lux, 378 days-255 mcd/m2/lux, 525 days-206 mcd/m2/lux, 595 days-190 mcd/m2/lux, 672 days-142 mcd/m2/lux, and 742 days-172 mcd/m2/lux.

Figure 39. Graph. Retroreflectivity degradation section 1 TN-N.

Figure 40.  Graph.  Retroreflectivity degradation section 2 TN-N.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking  age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  The trend line  edge line shallow groove has the following values:  21 days-433  mcd/m2/lux, 162 days- 318 mcd/m2/lux, 231 days-380 mcd/m2/lux, 308 days-325 mcd/m2/lux, 378 days- 373 mcd/m2/lux, 525 days-308 mcd/m2/lux, 595 days-312  mcd/m2/lux, 672 days- 277 mcd/m2/lux, and 742 days-253 mcd/m2/lux.  Trend line edge line deep groove has  the following values:  21 days-420 mcd/m2/lux, 162 days-344 mcd/m2/lux, 231 days- 421 mcd/m2/lux, 308 days-366 mcd/m2/lux, 378 days-413 mcd/m2/lux, 525 days- 351 mcd/m2/lux, 595 days-356 mcd/m2/lux, 672 days-305 mcd/m2/lux, and 742 days- 306 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days- 489 mcd/m2/lux, 162 days-298 mcd/m2/lux, 231 days-358 mcd/m2/lux, 308 days- 318 mcd/m2/lux, 378 days-341 mcd/m2/lux, 525 days-296 mcd/m2/lux, 595 days- 292 mcd/m2/lux, 672 days-280 mcd/m2/lux, and 742 days-240 mcd/m2/lux.  Trend line  lane line deep groove -has the following values:  21 days-450 mcd/m2/lux, 162 days- 325  mcd/m2/lux, 231 days-370 mcd/m2/lux, 308 days-324 mcd/m2/lux, 378 days- 360 mcd/m2/lux, 525 days-260 mcd/m2/lux, 595 days-297 mcd/m2/lux, 672 days- 261 mcd/m2/lux, and 742 days-262 mcd/m2/lux.

Figure 40. Graph. Retroreflectivity degradation section 2 TN-N.

Figure 41.  Graph.  Retroreflectivity degradation section 3 TN-N.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days-398 mcd/m2/lux, 162 days-331 mcd/m2/lux,  231 days-386 mcd/m2/lux, 308 days-372 mcd/m2/lux, 378 days-469 mcd/m2/lux,  525 days-426 mcd/m2/lux, 595 days-470 mcd/m2/lux, 672 days-408 mcd/m2/lux, and 742 days-342 mcd/m2/lux.  Trend line edge line deep groove has the following values:   21 days-384 mcd/m2/lux, 162 days-342 mcd/m2/lux, 231 days-409 mcd/m2/lux, 308 days-389 mcd/m2/lux, 378 days-502 mcd/m2/lux, 525 days-468 mcd/m2/lux, 595 days- 523 mcd/m2/lux, 672 days-487 mcd/m2/lux, and 742 days-435 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days-428 mcd/m2/lux, 162 days-325 mcd/m2/lux, 231 days-411 mcd/m2/lux, 308 days-370 mcd/m2/lux, 378 days-486 mcd/m2/lux, 525 days-422 mcd/m2/lux, 595 days-455 mcd/m2/lux, 672 days- 412 mcd/m2/lux, and 742 days-373 mcd/m2/lux.  Trend line lane line deep groove has  the following values:  21 days-389 mcd/m2/lux, 162 days-331 mcd/m2/lux, 231 days- 410 mcd/m2/lux, 308 days-379 mcd/m2/lux, 378 days-476 mcd/m2/lux, 525 days- 380 mcd/m2/lux, 595 days-462 mcd/m2/lux, 672 days-419 mcd/m2/lux, and 742 days- 410 mcd/m2/lux.

Figure 41. Graph. Retroreflectivity degradation section 3 TN-N.

Figure 42.  Graph.  Retroreflectivity degradation section 4 TN-N.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days-721 mcd/m2/lux, 162 days-647 mcd/m2/lux, 231 days-668 mcd/m2/lux, 308 days-597 mcd/m2/lux, 378 days-734 mcd/m2/lux, 525 days-644 mcd/m2/lux, 595 days-736 mcd/m2/lux, 672 days-556 mcd/m2/lux, and 742 days-632 mcd/m2/lux.  Trend line edge line deep groove has the following values: 21 days-716 mcd/m2/lux, 162 days-642 mcd/m2/lux, 231 days-668 mcd/m2/lux, 308 days-627 mcd/m2/lux, 378 days-813 mcd/m2/lux, 525 days-799 mcd/m2/lux, 595 days-826 mcd/m2/lux, 672 days-642 mcd/m2/lux, and 742 days-727 mcd/m2/lux.  Trend line  lane line deep groove has the following values:  21 days-563 mcd/m2/lux, 162 days-530 mcd/m2/lux, 231 days-561 mcd/m2/lux, 308 days-528 mcd/m2/lux, 378 days-685 mcd/m2/lux, 525 days-591 mcd/m2/lux, 595 days-659 mcd/m2/lux, 672 days-578 mcd/m2/lux, and 742 days-619 mcd/m2/lux.

Figure 42. Graph. Retroreflectivity degradation section 4 TN-N.

Figure 43.  Graph.  Retroreflectivity degradation section 5 TN-N.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days-732 mcd/m2/lux, 162 days-532 mcd/m2/lux, 231 days-558 mcd/m2/lux, 308 days-449 mcd/m2/lux, 378 days-438 mcd/m2/lux, 525 days-333 mcd/m2/lux, 595 days-338 mcd/m2/lux, 672 days-300 mcd/m2/lux, and 742 days-287 mcd/m2/lux.   Trend line lane line shallow groove has the following values:  21 days-659 mcd/m2/lux, 162 days-498 mcd/m2/lux, 231 days-504 mcd/m2/lux, 308 days-406 mcd/m2/lux, 378 days-409 mcd/m2/lux, 525 days-315 mcd/m2/lux, 595 days-325 mcd/m2/lux, 672 days-300 mcd/m2/lux, and 742 days-269 mcd/m2/lux.

Figure 43. Graph. Retroreflectivity degradation section 5 TN-N.

Figure 44.  Graph.  Retroreflectivity degradation section 6 TN-N.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days- 423 mcd/m2/lux, 162 days-350 mcd/m2/lux, 231 days-370 mcd/m2/lux, 308 days-299 mcd/m2/lux, 378 days-372 mcd/m2/lux, 525 days-371 mcd/m2/lux, 595 days-369 mcd/m2/lux, 672 days-321 mcd/m2/lux, and 742 days-339 mcd/m2/lux.  Trend line edge line deep groove has the following values: 21 days-418 mcd/m2/lux, 162 days-335 mcd/m2/lux, 231 days-373 mcd/m2/lux, 308 days-302 mcd/m2/lux, 378 days-373 mcd/m2/lux, 525 days-357 mcd/m2/lux, 595 days-376 mcd/m2/lux, 672 days-336 mcd/m2/lux, and 742 days-324 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days-398 mcd/m2/lux, 162 days-306 mcd/m2/lux, 231 days-311 mcd/m2/lux, 308 days-274 mcd/m2/lux, 378 days-332 mcd/m2/lux, 525 days-312 mcd/m2/lux, 595 days-313 mcd/m2/lux, 672 days-265 mcd/m2/lux, and 742 days-281 mcd/m2/lux.  Trend line lane line deep groove has the following values:  21 days-368 mcd/m2/lux, 162 days-319 mcd/m2/lux, 231 days-327 mcd/m2/lux, 308 days-296 mcd/m2/lux, 378 days-329 mcd/m2/lux, 525 days-316 mcd/m2/lux, 595 days-329 mcd/m2/lux, 672 days-290 mcd/m2/lux, and 742 days-281 mcd/m2/lux.

Figure 44. Graph. Retroreflectivity degradation section 6 TN-N.

Figure 45.  Graph.  Retroreflectivity degradation section 7 TN-N.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level inmcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days-1217 mcd/m2/lux, 162 days-752 mcd/m2/lux, 231 days-680 mcd/m2/lux, 308 days-602 mcd/m2/lux, 378 days-687 mcd/m2/lux, 525 days-581 mcd/m2/lux, 595 days-510 mcd/m2/lux, 672 days-436 mcd/m2/lux, and 742 days-449 mcd/m2/lux.  Trend line edge line deep groove has the following values:  21 days-1413 mcd/m2/lux, 162 days-796 mcd/m2/lux, 231 days-828 mcd/m2/lux, 308 days-702 mcd/m2/lux, 378 days-895 mcd/m2/lux, 525 days-771 mcd/m2/lux, 595 days-787 mcd/m2/lux, 672 days-671 mcd/m2/lux, and 742 days-618 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days-991 mcd/m2/lux, 162 days-690 mcd/m2/lux, 231 days-686 mcd/m2/lux, 308 days-616 mcd/m2/lux, 378 days-636 mcd/m2/lux, 525 days-497 mcd/m2/lux, 595 days-510 mcd/m2/lux, 672 days-398 mcd/m2/lux, and 742 days-410 mcd/m2/lux.  Trend line lane line deep groove has the following values:  21 days-1021 mcd/m2/lux, 162 days-686 mcd/m2/lux, 231 days-698 mcd/m2/lux, 308 days-650 mcd/m2/lux, 378 days-771 mcd/m2/lux, 525 days-611 mcd/m2/lux, 595 days-565 mcd/m2/lux, 672 days-508 mcd/m2/lux, and 742 days-438 mcd/m2/lux.

Figure 45. Graph. Retroreflectivity degradation section 7 TN-N.

Figure 46.  Graph.  Retroreflectivity degradation section 8 TN-N.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  21 days-371 mcd/m2/lux, 162 days-281 mcd/m2/lux, 231 days-284 mcd/m2/lux, 308 days-249 mcd/m2/lux, 378 days-310 mcd/m2/lux, 525 days-321 mcd/m2/lux, 595 days-301 mcd/m2/lux, 672 days-268 mcd/m2/lux, and 742 days-266 mcd/m2/lux.  Trend line edge line deep groove has the following values:  21 days-409 mcd/m2/lux, 162 days-343 mcd/m2/lux, 231 days-337 mcd/m2/lux, 308 days-277 mcd/m2/lux, 378 days-351 mcd/m2/lux, 525 days-298 mcd/m2/lux, 595 days-321 mcd/m2/lux, 672 days-272 mcd/m2/lux, and 742 days-269 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days-392 mcd/m2/lux, 162 days-282 mcd/m2/lux, 231 days-296 mcd/m2/lux, 308 days-272 mcd/m2/lux, 378 days-282 mcd/m2/lux, 525 days-289 mcd/m2/lux, 595 days-268 mcd/m2/lux, 672 days-263 mcd/m2/lux, and 742 days-254 mcd/m2/lux.  Trend line lane line deep groove has the following values:  21 days-416 mcd/m2/lux, 162 days-326 mcd/m2/lux, 231 days-361 mcd/m2/lux, 308 days-307 mcd/m2/lux, 378 days-343 mcd/m2/lux, 525 days-294 mcd/m2/lux, 595 days-273 mcd/m2/lux, 672 days-287 mcd/m2/lux, and 742 days-251 mcd/m2/lux.

Figure 46. Graph. Retroreflectivity degradation section 8 TN-N.

Figure 47.  Graph.  Retroreflectivity degradation section 9 TN-N.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2lux.  Trend line edge line shallow groove has the following values:  21 days-598 mcd/m2/lux, 162 days-450 mcd/m2/lux, 231 days-432 mcd/m2/lux, 308 days-388 mcd/m2/lux, 378 days-401 mcd/m2/lux, 525 days-381 mcd/m2/lux, 595 days-407 mcd/m2/lux, 672 days-347 mcd/m2/lux, and 742 days-342 mcd/m2/lux.  Trend line edge line deep groove has the following values:  21 days-599 mcd/m2/lux, 162 days-364 mcd/m2/lux, 231 days-388 mcd/m2/lux, 308 days-340 mcd/m2/lux, 378 days-419 mcd/m2/lux, 525 days-430 mcd/m2/lux, 595 days-405 mcd/m2/lux, 672 days-310 mcd/m2/lux, and 742 days-327 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  21 days-496 mcd/m2/lux, 162 days-339 mcd/m2/lux, 231 days-378 mcd/m2/lux, 308 days-311 mcd/m2/lux, 378 days-260 mcd/m2/lux, 525 days-201 mcd/m2/lux, 595 days-254 mcd/m2/lux, 672 days-242 mcd/m2/lux, and 742 days-222 mcd/m2/lux.  Trend line lane line deep groove has the following values:  21 days-495 mcd/m2/lux, 162 days-350 mcd/m2/lux, 231 days-396 mcd/m2/lux, 308 days-358 mcd/m2/lux, 378 days-385 mcd/m2/lux, 525 days-389 mcd/m2/lux, 595 days-379 mcd/m2/lux, 672 days-309 mcd/m2/lux, and 742 days-317 mcd/m2/lux.

Figure 47. Graph. Retroreflectivity degradation section 9 TN-N.

Tusculum, TN, Test Deck

Figure 48.  Graph.  Retroreflectivity degradation section 1 TN-T.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-673 mcd/m2/lux, 99 days-575 mcd/m2/lux, 169 days-574 mcd/m2/lux, 316 days-452 mcd/m2/lux, 386 days-373 mcd/m2/lux, 463 days-322 mcd/m2/lux, and 533 days-310 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-686 mcd/m2/lux, 99 days-621 mcd/m2/lux, 169 days-547 mcd/m2/lux, 316 days-336 mcd/m2/lux, 386 days-273 mcd/m2/lux, 463 days-232 mcd/m2/lux, and 533 days-238 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-560 mcd/m2/lux, 99 days-467 mcd/m2/lux, 169 days-470 mcd/m2/lux, 316 days-372 mcd/m2/lux, 386 days-292 mcd/m2/lux, 463 days-249 mcd/m2/lux, and 533 days-213 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-701 mcd/m2/lux, 99 days-612 mcd/m2/lux, 169 days-549 mcd/m2/lux, 316 days-289 mcd/m2/lux, 386 days-222 mcd/m2/lux, 463 days- 190 mcd/m2/lux, and 533 days-185 mcd/m2/lux.

Figure 48. Graph. Retroreflectivity degradation section 1 TN-T.

Figure 49.  Graph.  Retroreflectivity degradation section 2 TN-T a.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-510 mcd/m2/lux, 99 days-422 mcd/m2/lux, 169 days-471 mcd/m2/lux, 316 days-531 mcd/m2/lux, 386 days-478 mcd/m2/lux, 463 days-477 mcd/m2/lux, and 533 days-463 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-494 mcd/m2/lux, 99 days-470 mcd/m2/lux, 169 days-463 mcd/m2/lux, 316 days-562 mcd/m2/lux, 386 days-581 mcd/m2/lux, 463 days-573 mcd/m2/lux, and 533 days-521 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-549 mcd/m2/lux, 99 days-479 mcd/m2/lux, 169 days-434 mcd/m2/lux, 316 days-407 mcd/m2/lux, 386 days-396 mcd/m2/lux, 463 days-395 mcd/m2/lux, and 533 days-374 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-472 mcd/m2/lux, 99 days-526 mcd/m2/lux, 169 days-501 mcd/m2/lux, 316 days-464 mcd/m2/lux, 386 days-397 mcd/m2/lux, 463 days-394 mcd/m2/lux, and 533 days-386 mcd/m2/lux.

Figure 49. Graph. Retroreflectivity degradation section 2 TN-T a.

Figure 50.  Graph.  Retroreflectivity degradation section 2 TN-T b.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-485 mcd/m2/lux, 99 days-423 mcd/m2/lux, 169 days-429 mcd/m2/lux, 316 days-273 mcd/m2/lux, 386 days-244 mcd/m2/lux, 463 days-231 mcd/m2/lux, and 533 days-203 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-531 mcd/m2/lux, 99 days-476 mcd/m2/lux, 169 days-509 mcd/m2/lux, 316 days-439 mcd/m2/lux, 386 days-384 mcd/m2/lux, 463 days-372 mcd/m2/lux, and 533 days-350 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-470 mcd/m2/lux, 99 days-409 mcd/m2/lux, 169 days-412 mcd/m2/lux, 316 days-279 mcd/m2/lux, 386 days-271 mcd/m2/lux, 463 days-243 mcd/m2/lux, and 533 days-245 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-447 mcd/m2/lux, 99 days-386 mcd/m2/lux, 169 days-404 mcd/m2/lux, 316 days-354 mcd/m2/lux, 386 days-317 mcd/m2/lux, 463 days-308 mcd/m2/lux, and 533 days-304 mcd/m2/lux.

Figure 50. Graph. Retroreflectivity degradation section 2 TN-T b.

Figure 51.  Graph.  Retroreflectivity degradation section 3 TN-T.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-423 mcd/m2/lux, 99 days-309 mcd/m2/lux, 169 days-312 mcd/m2/lux, 316 days-299 mcd/m2/lux, 386 days-245 mcd/m2/lux, 463 days-217 mcd/m2/lux, and 533 days-199 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-420 mcd/m2/lux, 99 days-363 mcd/m2/lux, 169 days-381 mcd/m2/lux, 316 days-394 mcd/m2/lux, 386 days-392 mcd/m2/lux, 463 days-344 mcd/m2/lux, and 533 days-349 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-440 mcd/m2/lux, 99 days-377 mcd/m2/lux, 169 days-309 mcd/m2/lux, 316 days-293 mcd/m2/lux, 386 days-266 mcd/m2/lux, 463 days-218 mcd/m2/lux, and 533 days-214 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-394 mcd/m2/lux, 99 days-366 mcd/m2/lux, 169 days-337 mcd/m2/lux, 316 days-319 mcd/m2/lux, 386 days-306 mcd/m2/lux, 463 days-277 mcd/m2/lux, and 533 days-255 mcd/m2/lux.

Figure 51. Graph. Retroreflectivity degradation section 3 TN-T.

Figure 52.  Graph.  Retroreflectivity degradation section 4 TN-T.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level (mcd/m2/lux).  Trend line edge line shallow groove has the following values:  22 days-415 mcd/m2/lux, 99 days-365 mcd/m2/lux, 169 days-395 mcd/m2/lux, 316 days-454 mcd/m2/lux, 386 days-408 mcd/m2/lux, 463 days-390 mcd/m2/lux, and 533 days-380 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-397 mcd/m2/lux, 99 days-372 mcd/m2/lux, 169 days-384 mcd/m2/lux, 316 days-427 mcd/m2/lux, 386 days-402 mcd/m2/lux, 463 days-386 mcd/m2/lux, and 533 days-365 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-389 mcd/m2/lux, 99 days-347 mcd/m2/lux, 169 days-356 mcd/m2/lux, 316 days-412 mcd/m2/lux, 386 days-352 mcd/m2/lux, 463 days-329 mcd/m2/lux, and 533 days-319 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-358 mcd/m2/lux, 99 days-340 mcd/m2/lux, 169 days-340 mcd/m2/lux, 316 days-399 mcd/m2/lux, 386 days-371 mcd/m2/lux, 463 days-362 mcd/m2/lux, and 533 days-337 mcd/m2/lux.

Figure 52. Graph. Retroreflectivity degradation section 4 TN-T.

Figure 53.  Graph.  Retroreflectivity degradation section 5 TN-T a.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows pavement marking age in days, and the y-axis shows the retroreflectivity level (mcd/m2/lux).  Trend line edge line shallow groove has the following values:  22 days-950 mcd/m2/lux, 99 days-856 mcd/m2/lux, 169 days-787 mcd/m2/lux, 316 days-598 mcd/m2/lux, 386 days-496 mcd/m2/lux, 463 days-513 mcd/m2/lux, and 533 days-449 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-1152 mcd/m2/lux, 99 days-1030 mcd/m2/lux, 169 days-972 mcd/m2/lux, 316 days-801 mcd/m2/lux, 386 days-696 mcd/m2/lux, 463 days-687 mcd/m2/lux, and 533 days-605 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  99 days-838 mcd/m2/lux, 169 days-772 mcd/m2/lux, 316 days-531 mcd/m2/lux, 386 days-406 mcd/m2/lux, 463 days-433 mcd/m2/lux, and 533 days-352 mcd/m2/lux.  Trend line lane line deep groove has the following values:  99 days-908 mcd/m2/lux, 169 days-785 mcd/m2/lux, 316 days-491 mcd/m2/lux, 386 days-420 mcd/m2/lux, 463 days-424 mcd/m2/lux, and 533 days-355 mcd/m2/lux.

Figure 53. Graph. Retroreflectivity degradation section 5 TN-T a.

Figure 54.  Graph.  Retroreflectivity degradation section 5 TN-T b.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-1,082 mcd/m2/lux, 99 days-945 mcd/m2/lux, 169 days-894 mcd/m2/lux, 316 days-677 mcd/m2/lux, 386 days-602 mcd/m2/lux, 463 days-539 mcd/m2/lux, and 533 days-482 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-1,079 mcd/m2/lux, 99 days-966 mcd/m2/lux, 169 days-922 mcd/m2/lux, 316 days-613 mcd/m2/lux, 386 days-535 mcd/m2/lux, 463 days-496 mcd/m2/lux, and 533 days-415 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  99 days-780 mcd/m2/lux, 169 days-794 mcd/m2/lux, 316 days-470 mcd/m2/lux, 386 days-422 mcd/m2/lux, 463 days-369 mcd/m2/lux, and 533 days-302 mcd/m2/lux.  Trend line lane line deep groove has the following values:  99 days-861 mcd/m2/lux, 169 days-693 mcd/m2/lux, 316 days-345 mcd/m2/lux, 386 days-264 mcd/m2/lux, 463 days-263 mcd/m2/lux, and 533 days-214 mcd/m2/lux.

Figure 54. Graph. Retroreflectivity degradation section 5 TN-T b.

Figure 55.  Graph.  Retroreflectivity degradation section 6 TN-T.  The graph shows the trend of retroreflectivity degradation over time.  The x-axis shows pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove has the following values:  22 days-468 mcd/ m2/lux, 99 days-410 mcd/ m2/lux, 169 days-442 mcd/ m2/lux, 316 days-441 mcd/ m2/lux, 386 days-431 mcd/ m2/lux, 463 days-468 mcd/ m2/lux /lux, and 533 days-467 mcd/m2/lux.  Trend line edge line deep groove has the following values:  22 days-464 mcd/m2/lux, 99 days-421 mcd/m2/lux, 169 days-437 mcd/m2/lux, 316 days-431 mcd/m2/lux, 386 days-431 mcd/m2/lux, 463 days-455 mcd/m2/lux, and 533 days-473 mcd/m2/lux.  Trend line lane line shallow groove has the following values:  22 days-477 mcd/m2/lux, 99 days-461 mcd/m2/lux, 169 days-441 mcd/m2/lux, 316 days-421 mcd/m2/lux, 386 days-450 mcd/m2/lux, 463 days-487 mcd/m2/lux, and 533 days-459 mcd/m2/lux.  Trend line lane line deep groove has the following values:  22 days-470 mcd/m2/lux, 99 days-454 mcd/m2/lux, 169 days-407 mcd/m2/lux, 316 days-381 mcd/m2/lux, 386 days-426 mcd/m2/lux, 463 days-442 mcd/m2/lux, and 533 days-463 mcd/m2/lux.

Figure 55. Graph. Retroreflectivity degradation section 6 TN-T.

Figure 56.  Graph.  Retroreflectivity degradation section 7 TN-T.  The graph shows the trend of retroreflectivity degradation over time. The x-axis shows the pavement marking age in days, and the y-axis shows the retroreflectivity level in mcd/m2/lux.  Trend line edge line shallow groove  has the following values:  22 days-650 mcd/ m2/lux, 99 days-535 mcd/ m2/lux, 169 days-587 mcd/ m2/lux, 316 days-487 mcd/ m2/lux, 386 days-433 mcd/ m2/lux, 463 days-386 mcd/ m2/lux, and 533 days-390 mcd/ m2/lux.  Trend line edge line deep groove  has the following values:  22 days-95 mcd/ m2/lux, 99 days-575 mcd/ m2/lux, 169 days-585 mcd/ m2/lux, 316 days-521 mcd/ m2/lux, 386 days-423 mcd/ m2/lux, 463 days-432 mcd/ m2/lux, and 533 days-417 mcd/ m2/lux.  Trend line lane line shallow groove has the following values:  22 days-505 mcd/ m2/lux, 99 days-423 mcd/ m2/lux, 169 days-
522 mcd/ m2/lux, 316 days-415 mcd/ m2/lux, 386 days-389 mcd/ m2/lux, 463 days-352 mcd/ m2/lux, and 533 days-340 mcd/ m2/lux.  Trend line lane line deep groove has the following values:  22 days-470 mcd/ m2/lux, 99 days-435 mcd/ m2/lux, 169 days-497 mcd/ m2/lux, 316 days-454 mcd/ m2/lux, 386 days-350 mcd/ m2/lux, 463 days-395 mcd/ m2/lux, and 533 days-357 mcd/ m2/lux.

Figure 56. Graph. Retroreflectivity degradation section 7 TN-T.

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