[Tagging] Variable max speed corridors

[Martijn van Exel]

Variable max speed corridors are nothing new for Europe, but they
apparently are a novelty for the US.
Is there an established tagging convention for this?

http://www.katu.com/news/local/Variable-speed-limit-signs-are-coming-to-Portland-136326623.html

-- 
martijn van exel
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