<http://schema.org/description>
"The variable speed signs along Interstate 270 haven't been as productive in easing congestion as hoped in their nearly two years in operation."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.riverfronttimes.com/newsblog/2011/03/10/feel-free-to-ignore-digital-speed-signs-on-i-270-beginning-in-july>