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/ Applicability of the 85th Percentile for Setting Speed Limits on Freeways, Expressways, and Rural Highways https://rip.trb.org/View/2381738 Wed, 22 May 2024 11:45:33 GMT https://rip.trb.org/View/2381738 Developing a Knowledge-Based System for Guiding Design, Operations, and Evaluation of Highway Work Zones. https://rip.trb.org/View/2118358 Tue, 14 Feb 2023 13:17:46 GMT https://rip.trb.org/View/2118358 Interstate 4 (I-4) Florida's Regional Advanced Mobility Elements https://rip.trb.org/View/1840374 Thu, 11 Mar 2021 11:30:34 GMT https://rip.trb.org/View/1840374 SPR-4441: Public Acceptance of INDOT’s Transportation Services https://rip.trb.org/View/1653583 Wed, 25 Sep 2019 12:10:58 GMT https://rip.trb.org/View/1653583 Preliminary Investigations https://rip.trb.org/View/1441841 Wed, 04 Jan 2017 10:54:12 GMT https://rip.trb.org/View/1441841 AASHTO Rep to SAE DSRC Technical Committee https://rip.trb.org/View/1440830 Wed, 28 Dec 2016 11:39:27 GMT https://rip.trb.org/View/1440830 Developing Guidelines and Documentation of Engineering Studies for Establishing NC Speed Limits https://rip.trb.org/View/1423763 Mon, 19 Sep 2016 16:41:09 GMT https://rip.trb.org/View/1423763 Evaluation of Change and Clearance Intervals Prior to the Flashing Yellow Arrow Permissive Left-Turn Indication https://rip.trb.org/View/1359249 Sat, 27 Jun 2015 01:00:49 GMT https://rip.trb.org/View/1359249 Research for AASHTO Standing Committee on Highways. Task 370. Development of a Strategic Plan for the Subcommittee on Traffic Engineering (SCOTE) https://rip.trb.org/View/1350636 Fri, 17 Apr 2015 01:00:05 GMT https://rip.trb.org/View/1350636 Research for AASHTO Standing Committee on Highways. Task 334. Primer on the Joint Use of the HSM and HFG https://rip.trb.org/View/1332063 Sun, 23 Nov 2014 01:00:45 GMT https://rip.trb.org/View/1332063 Road Diet or No Road Diet: a Case Study of the Fifth Street Corridor https://rip.trb.org/View/1236253 Thu, 03 Jan 2013 15:43:46 GMT https://rip.trb.org/View/1236253 Evaluate Sensys and Radar Detectors https://rip.trb.org/View/1234299 Thu, 03 Jan 2013 15:10:07 GMT https://rip.trb.org/View/1234299 Validation and Calibration of Smart-Growth Land-Use Projects Trip-Generation Rates Spreadsheet https://rip.trb.org/View/1234298 Thu, 03 Jan 2013 15:10:06 GMT https://rip.trb.org/View/1234298