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                Safety Eligibility Letter WZ-55
  
  **Hardware Type:**
            Work Zone Devices
                          **Code:**
            WZ-55
                          **Date:**
            12/18/2000
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            Craig Mittlestadt, Minnesota DOT
                          **Device Description:**
            Type III Barricade perforated square steel tube. Type III Barricade with sign (no lights on either)
                          **View PDF:**
            wz55.pdf (200.07 KB) U.S. DEPARTMENT OF TRANSPORTATION

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