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Legislative action in 2007 named I-5, I-82 and I-90 “Green Highways.” With this designation, these routes through Washington have been identified as routes to provide locations for alternative fuel facilities.  
  The "Tsunami Evacuation Route" markers are used to designate the evacuation routes established by local jurisdictions in cooperation with emergency management officials.
The "Volcano Evacuation Route" markers are used to designate the evacuation routes established by local jurisdictions in cooperation with emergency management officials.
 
  The "Fender Bender?" signs are to encourage uninjured motorists involved in "fender bender" type collisions to move their vehicles out of the traffic lanes, if the vehicles are still drive-able. Following a minor collision, driving a vehicle to the nearest shoulder can prevent other "secondary" collisions.
The "Tsunami Hazard Zone" sign is intended to be posted at Pacific coast access points, or other low-lying areas that would clearly be vulnerable to a large, locally generated Tsunami. Signs are to be placed at locations agreed upon by local and state governmental authorities.