I know the NJ Turnpike does it through some aged variable message/speed
signs.  They also exist on I-95 in Delaware.

Happy Holidays!

Wade L. White, AICP

Whitehouse Group
40 East Joyce Lane
Arnold, MD 21012
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-----Original Message-----
From: FHWA Freight Planning [mailto:[log in to unmask]] On Behalf Of
Dale A Tabat
Sent: Monday, November 29, 2010 4:28 PM
To: [log in to unmask]
Subject: Inclement weather speed limit reductions

The Washington State DOT is interested in information on the following:

1) Are there any states that decrease the posted speed limit in the event of

inclement weather (snow and ice in particular) and if so how is that 
accomplished? Is the speed limit decrease applied to specific road segments 
only or can it be incorporated across a state's entire highway system?
for related information for all traffic in general and freight trucks in

2) Are there any urban areas that issue chain requirements for freight
during snow/ice conditions?

Thank you for any input.

Dale A Tabat
Truck Freight Program and Policy Manager
Washington State Departemnt of Transportation
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