Best Practices for Road Weather Management Version 3.0: Tennessee DOT Low Visibility Warning System

Details

• Corporate Creators:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Road weather information systems
  • Weather conditions
  • Weather forecasting
  • Visibility
  • Fog
• Resource Type:
  Brief
• Geographical Coverage:
  United States;Tennessee
• Corporate Publisher:
  United States. Federal Highway Administration
• Abstract:
  In December of 1973, the segment of Interstate 75 near Calhoun, Tennessee, was opened to traffic. Following this date, multiple vehicle accidents occurred due to visibility problems experienced in foggy conditions. The culmination of these events occurred on December 11, 1990 when dense fog contributed to a series of chain-reaction collisions involving 99 vehicles with 42 injuries and 12 fatalities. In 1993, a fog detection and warning system was implemented along the Interstate section. This system includes a three-mile (five-kilometer) fog detection area spanning north and south of the Hiwassee River and an eight-mile (13-kilometer) warning zone on each approach to the fog prone area. In 2006, a project was initiated to upgrade the original system to current technology. Driver safety issues due to visibility problems have improved significantly since the system has been in place, with only one fog-contributed accident being recorded in 2001.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/63483/dot_63483_DS1.pdf
• File Type:
  [PDF - 117.73 KB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:00ed794bae37639e9214bf7ab99802e8eea56ec2ccef6ed1e9af089dd4512a67d980dc887220b804aabdf8dc8b553c7445d1867f2294bb0519a68710e712de79