Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2024. 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/ Developing Prestressed Concrete Girder Cross-Sections for Longer Spans and New Materials https://rip.trb.org/View/2221102 Sun, 30 Jul 2023 21:12:04 GMT https://rip.trb.org/View/2221102 Sidewall Collapse of Underground Structures Due to Loss of Lateral Support Under Internal Blast Loading https://rip.trb.org/View/1239218 Thu, 31 Jan 2013 01:01:34 GMT https://rip.trb.org/View/1239218