U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

 
Report
This report is an archived publication and may contain dated technical, contact, and link information
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

Previous | Table of Contents | Next

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.

Previous | Table of Contents | Next

ResearchFHWA
FHWA
United States Department of Transportation - Federal Highway Administration