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       Triple 
        Traffic Management Center to ITS Roadway Equipment: variable speed limit control
      Flow Description 
        Information used to configure and control variable speed limit systems including the equipment used to provide current speed limits and other information to drivers.
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       Solutions 
                      Solution Description 
        This solution is used within the U.S..  It combines standards associated with US: NTCIP Message Sign with those for I-F: SNMPv1/TLS. The US: NTCIP Message Sign standards include upper-layer standards required to implement centre-to-field message sign communications.  The I-F: SNMPv1/TLS standards include lower-layer standards that define one way to retrofit basic security into SNMPv1 implementations (mainly in the US); however, this only secures the communications link and does not provide end-application security and is not recommended for new deployments.
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       Triple Solution Gap 
      
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       ITS Info 
      NTCIP 1203  
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       Click gap icons for more info. 
      
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       Mgmt 
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       Facility 
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       Security 
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      IETF RFC 5246  
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       TransNet 
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       SubNet 
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