https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ https://rip.trb.org/View/2772116 Fri, 28 Aug 2026 17:25:08 GMT https://rip.trb.org/View/2772116 https://rip.trb.org/View/2772335 Fri, 28 Aug 2026 17:24:56 GMT https://rip.trb.org/View/2772335 https://rip.trb.org/View/2768413 Wed, 26 Aug 2026 17:04:22 GMT https://rip.trb.org/View/2768413 https://rip.trb.org/View/2734857 Thu, 23 Jul 2026 07:25:06 GMT https://rip.trb.org/View/2734857 https://rip.trb.org/View/2731920 Fri, 17 Jul 2026 13:08:30 GMT https://rip.trb.org/View/2731920 https://rip.trb.org/View/2730683 Thu, 16 Jul 2026 07:52:26 GMT https://rip.trb.org/View/2730683 https://rip.trb.org/View/2726545 Thu, 09 Jul 2026 08:35:20 GMT https://rip.trb.org/View/2726545 https://rip.trb.org/View/2726544 Thu, 09 Jul 2026 08:06:36 GMT https://rip.trb.org/View/2726544 https://rip.trb.org/View/2721743 Thu, 02 Jul 2026 10:54:08 GMT https://rip.trb.org/View/2721743 https://rip.trb.org/View/2719305 Thu, 25 Jun 2026 09:03:22 GMT https://rip.trb.org/View/2719305 https://rip.trb.org/View/2717328 $100,000), (2) tedious specimen preparation and cutting time, and (3) long testing time (weeks). Without fatigue testing, default fatigue property values (or model parameters) are generally used, making the resulting pavement designs questionable. For example, reclaimed asphalt pavement (RAP) often stiffens asphalt mixes. The increased modulus leads to a thinner pavement structure from the ME design programs if the actual fatigue property of asphalt mixes containing RAP is not used in the design process. With emphasis on sustainability and use of more recycled materials in asphalt mixes, it becomes rather urgent to have a simple and expensive fatigue test for routine use by state DOTs and the asphalt industry. For NCHRP 20-30/IDEA 265, the research team will develop an artificial intelligence (AI)-powered IDEAL fatigue test to make it simple and easy for state DOTs to determine fatigue of their asphalt mixes and optimize their pavement structural designs more accurately. The test will use a low-cost loading frame that most DOTs or contractors already have for balanced mix design. An AI-powered learning algorithm will be developed that will take the measured displacement-force data to determine the fatigue model parameters. The algorithm will be trained with historical Flexural BBF test datasets and validated by comparing the fatigue model parameters of at least 10 asphalt mixes determined by the BBF test with those using the AI-powered algorithm. Using test results, the system’s hardware and software will be refined and finalized. A test procedure will be drafted for evaluation by partner state DOTs. Eight state DOTs (Texas, California, Michigan, Minnesota, Mississippi, Massachusetts, South Carolina, and Virginia) are collaborating on this effort. These partner states will also help develop a plan to demonstrate the new AI-powered fatigue test to other state DOTs.]]> Tue, 23 Jun 2026 13:37:52 GMT https://rip.trb.org/View/2717328 https://rip.trb.org/View/2717326 Tue, 23 Jun 2026 13:22:57 GMT https://rip.trb.org/View/2717326 https://rip.trb.org/View/2712200 Wed, 10 Jun 2026 11:05:18 GMT https://rip.trb.org/View/2712200 https://rip.trb.org/View/2689392 Tue, 02 Jun 2026 12:25:00 GMT https://rip.trb.org/View/2689392 https://rip.trb.org/View/2703922 Tue, 19 May 2026 13:37:20 GMT https://rip.trb.org/View/2703922