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/ A Framework for Integrated Quality of Service Evaluation using Operational and Safety Considerations https://rip.trb.org/View/2703926 Thu, 21 May 2026 22:41:30 GMT https://rip.trb.org/View/2703926 Safety, Empowerment, and Dignity: Improving the Airport Journey of Customers Using Wheelchairs https://rip.trb.org/View/2226019 Thu, 10 Aug 2023 10:01:44 GMT https://rip.trb.org/View/2226019 Addressing Travel Needs of Women and Families on Public Transportation https://rip.trb.org/View/2083657 Tue, 13 Dec 2022 09:10:31 GMT https://rip.trb.org/View/2083657 Implement a Regional Cloud-based Traffic Management AI System to Improve Transit Travel times, Enhance Mobility on Demand (MOD) Services, Reduce Congestion, and Improve Incident Response Times. https://rip.trb.org/View/2077897 Tue, 06 Dec 2022 09:48:12 GMT https://rip.trb.org/View/2077897 Transit Capacity and Quality of Service Manual, Fourth Edition https://rip.trb.org/View/1893350 Tue, 23 Nov 2021 18:50:59 GMT https://rip.trb.org/View/1893350 Transit Dependents, Choice Riders, and Service Criticality: An Analysis of the Determinants of Bus Ridership in the Philadelphia Region https://rip.trb.org/View/1758050 Wed, 16 Dec 2020 14:35:31 GMT https://rip.trb.org/View/1758050 Synthesis of Information Related to Transit Practices. Topic SG-19. Paratransit Service Delivery Models for Small Systems https://rip.trb.org/View/1708344 Tue, 26 May 2020 20:16:51 GMT https://rip.trb.org/View/1708344 Synthesis of Information Related to Transit Practices. Topic SA-53. BRT State of Practice, Experience, and Lessons Learned https://rip.trb.org/View/1708341 Tue, 26 May 2020 07:42:17 GMT https://rip.trb.org/View/1708341 Reliability and Quality of Service Evaluation Methods for Rural Highways https://rip.trb.org/View/1628600 Sat, 08 Jun 2019 10:04:39 GMT https://rip.trb.org/View/1628600 Improving Access and Management of Transit ITS Data https://rip.trb.org/View/1577716 Tue, 08 Jan 2019 07:15:33 GMT https://rip.trb.org/View/1577716 Update of Highway Capacity Manual: Merge, Diverge, and Weaving Methodologies https://rip.trb.org/View/1516154 Mon, 18 Jun 2018 19:25:48 GMT https://rip.trb.org/View/1516154 Development and Assessment of Performance Measures for Evaluating and Improving Regional Transit Coordination Using GTFS Data https://rip.trb.org/View/1397928 Wed, 10 Feb 2016 09:26:18 GMT https://rip.trb.org/View/1397928 Transit Service Reliability: Analyzing Automatic Vehicle Location (AVL) Data For On-Time Performance and to Identify Conditions Leading to Service Degradation https://rip.trb.org/View/1396080 Tue, 26 Jan 2016 09:21:46 GMT https://rip.trb.org/View/1396080 Evaluating the State of Mobility Management and Human Service Transportation Coordination https://rip.trb.org/View/1396082 Tue, 26 Jan 2016 09:16:15 GMT https://rip.trb.org/View/1396082 Transportation Infrastructure Robustness: Analysis And Measurement https://rip.trb.org/View/1378067 Wed, 23 Dec 2015 12:48:56 GMT https://rip.trb.org/View/1378067