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/ Traffic Signal Change and Clearance Interval Pooled Fund Study https://rip.trb.org/View/1758857 Mon, 21 Dec 2020 19:05:20 GMT https://rip.trb.org/View/1758857