Reduced Visibility Due to Fog on the Highway. A Synthesis of Highway Practice

摘要

This synthesis will be of interest to traffic and safety engineers; highway andbridge designers; police, fire, and emergency personnel; toll authorities; and other officials concerned with roadway safety operations. It describes the forecasting and detection of fog, as well as countermeasures that are used by state and local transportation agencies to dissipate fog and to warn motorists during reduced visibility conditions. This publication presents a generalized background on the causes of fog, fog forecasting and detection methods, and how fog affects the roadway and the driver. The various countermeasures practiced by transportation agencies that are described range from techniques to dissipate fog to a variety of warning systems to alert drivers to adverse conditions.