Research in Progress (RIP) 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) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Public Utilities Within SDDOT’s Highway Right of Way https://rip.trb.org/View/2704041 Wed, 20 May 2026 12:00:00 GMT https://rip.trb.org/View/2704041 SDDOT 2024 Statewide Customer Satisfaction Assessment https://rip.trb.org/View/2704024 Wed, 20 May 2026 09:33:12 GMT https://rip.trb.org/View/2704024 Efficient Construction Material Testing and Inspection Based on Risk Levels https://rip.trb.org/View/2533743 Tue, 01 Apr 2025 08:45:48 GMT https://rip.trb.org/View/2533743 Evaluation of Granular Density and Moisture Testing https://rip.trb.org/View/1852212 Thu, 13 May 2021 08:53:43 GMT https://rip.trb.org/View/1852212 Pavement Preservation Guide Update for SDDOT and Local Agencies https://rip.trb.org/View/1851960 Tue, 11 May 2021 17:02:54 GMT https://rip.trb.org/View/1851960 Technical Support for SDDOT's Pile Load Testing https://rip.trb.org/View/1851858 Tue, 11 May 2021 15:27:41 GMT https://rip.trb.org/View/1851858 Winter Maintenance Levels of Service and Performance Measures https://rip.trb.org/View/1844015 Mon, 29 Mar 2021 10:47:06 GMT https://rip.trb.org/View/1844015 Snowplow Route Optimization for SDDOT https://rip.trb.org/View/1843617 Fri, 26 Mar 2021 16:32:10 GMT https://rip.trb.org/View/1843617 Improvement of Approach Smoothness on Integral Abutment Bridges https://rip.trb.org/View/1843615 Fri, 26 Mar 2021 16:14:55 GMT https://rip.trb.org/View/1843615