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/ Airport Guide for Transitioning to Unleaded Aviation Gasoline https://rip.trb.org/View/2007976 Mon, 15 Aug 2022 16:24:12 GMT https://rip.trb.org/View/2007976 Gasoline Taxes: An Examination of News Media Discourse Related to Gas Tax Funding Debates in Six States https://rip.trb.org/View/1359749 Thu, 02 Jul 2015 01:01:02 GMT https://rip.trb.org/View/1359749 Studies in Consumers and Automotive Fuel Economy: A Qualitative Field Test of the Effects of Driver Feedback on Automotive Fuel Consumption https://rip.trb.org/View/1236716 Thu, 03 Jan 2013 15:51:48 GMT https://rip.trb.org/View/1236716 Optimal Gasoline Taxes and the Elasticity of Demand for Gasoline https://rip.trb.org/View/1235189 Thu, 03 Jan 2013 15:25:52 GMT https://rip.trb.org/View/1235189 Creating a Viable Transportation Funding System https://rip.trb.org/View/1228893 Thu, 03 Jan 2013 13:30:07 GMT https://rip.trb.org/View/1228893