<http://schema.org/alternativeHeadline>
"The city of L.A., long notorious for terrible traffic, launches an ambitious attack on gridlock by synchronizing every one of its 4,398 traffic signals."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/transportation/videos/los-angeles-syncs-more-than-4000-traffic-lights-to-ease-gridlock>