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I know in Seattle there are variable speed limit zones, where the signs are digital displays that can be changed at anytime to reflect appropriate speed limits

I know in Seattle there are variable speed limit zones, where the signs are digital displays that can be changed at anytime to reflect appropriate speed limits for the current conditions.

DasIch 12y ago
These are heavily used in Germany on the Autobahn as well.
- warbastard 12y ago
  And in the UK on the busier stretches of motorway