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Trb research in progress database

1 August 2006

The Research in Progress (RiP) Database contains more than 7,500 records of
current or recently completed transportation research projects.
-> http://rip.trb.org/browse/additions.asp?days=7

Items include: Operational Effects of Shoulder and Centerline Rumble Strips on Two-Lane Undivided Highways  Previous research has shown that shoulder rumble strips significantly reduce the frequency of run-off-road crashes.