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/ Impact of Passing Lane Guidance through Angled Markings on Two-Lane Rural Highways https://rip.trb.org/View/2655580 Thu, 15 Jan 2026 13:01:45 GMT https://rip.trb.org/View/2655580 Assessment of Pedestrian Safety and Driver Behavior Near AVs https://rip.trb.org/View/2531107 Mon, 31 Mar 2025 15:17:00 GMT https://rip.trb.org/View/2531107 Identifying and Analyzing Pass-by Crashes for the Purpose of Designing Proper Intervention Measures to Mitigate Crashes Involving Rural Population https://rip.trb.org/View/2509040 Wed, 12 Feb 2025 17:48:56 GMT https://rip.trb.org/View/2509040 Motorist Behavior and Safety Impacts on Bicyclists from Centerline and Shoulder Rumble Strips on High-Speed Two-Lane Highways https://rip.trb.org/View/1854203 Tue, 25 May 2021 11:24:08 GMT https://rip.trb.org/View/1854203 Creating a Situation-aware Sensing Environment for Cyclists: An Innovative and Cost-effective Smartphone-based Approach https://rip.trb.org/View/1756017 Sat, 05 Dec 2020 18:16:08 GMT https://rip.trb.org/View/1756017 Two-lane highway analysis methodology enhancements considering commercial trucks https://rip.trb.org/View/1552818 Wed, 03 Oct 2018 15:19:28 GMT https://rip.trb.org/View/1552818 Effects of Safe Bicycle Passing Laws on Drivers’ Behavior and Bicyclists’ Safety https://rip.trb.org/View/1483418 Fri, 22 Sep 2017 10:46:09 GMT https://rip.trb.org/View/1483418