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National Geographic has uploaded Musical Highway Road contractors engineered...

National Geographic has uploaded Musical Highway Musical Highway National Geographic Road contractors engineered an ingenious and melodic way to encourage drivers to obey the speed limit. CROWD CONTROL AIRS MONDAYS at 9P. © 2014 YouTube, LLC 901 Cherry Ave, San Bruno, CA 94066 You were sent this email because you chose to receive updates from National Geographic. If you don't want these updates anymore, you can unsubscribe here.