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/ Which Way Forward? Learning from Global Informal Transport Networks to Inform Microtransit Services in California https://rip.trb.org/View/2695811 Thu, 23 Apr 2026 18:05:53 GMT https://rip.trb.org/View/2695811 Using Artificial Intelligence to Uncover How Safety Perception Influences Travel Behavior Shifts: Comparative & Longitudinal Analysis for the Future of Autonomous Vehicle, Transit and Ride-hailing Services https://rip.trb.org/View/2655700 Mon, 19 Jan 2026 16:09:31 GMT https://rip.trb.org/View/2655700 Towards an Efficient Robotaxi Deployment https://rip.trb.org/View/2625316 Thu, 13 Nov 2025 16:03:29 GMT https://rip.trb.org/View/2625316 Compliance of Alternate Transit Options with State and Federal Requirements https://rip.trb.org/View/2487297 Tue, 07 Jan 2025 18:56:38 GMT https://rip.trb.org/View/2487297 Tompkins Mobility-as-a-Service (MaaS) Phase 1 https://rip.trb.org/View/2077906 Tue, 06 Dec 2022 09:48:17 GMT https://rip.trb.org/View/2077906 Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services into Ridesharing Mode https://rip.trb.org/View/2004407 Sun, 07 Aug 2022 16:11:56 GMT https://rip.trb.org/View/2004407 The Provision of Alternative Services by Transit Agencies: The Intersection of Regulation and Program Objectives https://rip.trb.org/View/1713373 Tue, 09 Jun 2020 10:21:44 GMT https://rip.trb.org/View/1713373 Optimizing ADA Paratransit Operations with Taxi and Ride Share Programs https://rip.trb.org/View/1574983 Mon, 17 Dec 2018 15:56:59 GMT https://rip.trb.org/View/1574983 The Environmental Effects of New Mobility Services https://rip.trb.org/View/1441929 Wed, 04 Jan 2017 10:57:02 GMT https://rip.trb.org/View/1441929 Smartphone Information and Transportation Demand Modeling: An Analysis of Transportation Network Companies https://rip.trb.org/View/1441922 Wed, 04 Jan 2017 10:56:49 GMT https://rip.trb.org/View/1441922 Urban Travel Time Variability: Spatio-Temporal Analysis for New York City https://rip.trb.org/View/1425397 Tue, 04 Oct 2016 15:59:24 GMT https://rip.trb.org/View/1425397 Why TNCs Will Be Regulated Like Taxis–Historically Speaking https://rip.trb.org/View/1350301 Tue, 14 Apr 2015 01:00:35 GMT https://rip.trb.org/View/1350301