A fog and smoke risk index for estimating roadway visibility hazard
Document Type: Journal Article
Author(s): Leonidas G. Lavdas; Gary L. Achtemeier
Publication Year: 1995

Cataloging Information

  • air quality
  • fire management
  • Florida
  • roads
  • smoke behavior
  • smoke effects
  • smoke management
  • wildfires
Record Maintained By:
Record Last Modified: May 29, 2019
FRAMES Record Number: 53740
Tall Timbers Record Number: 31228
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.


National Weather Service (NWS) observations were compared to Florida Highway Patrol accident site visibility reports to produce a Low Visibility Occurrence Risk Index (LVORI). When LVORI is compared with NWS visibility observations, significant differences are found. These differences appear to be related to two types of fog: advection and radiation. The data suggest that localized radiation fogs pose greater hazards than widespread advection fogs. Apparently, drivers are able to adjust when fog is widespread, but are less successful when very low visibility is suddenly encountered.

Online Link(s):
Lavdas, L. G., and G. L. Achtemeier. 1995. A fog and smoke risk index for estimating roadway visibility hazard. National Weather Digest, v. 20, no. 1, p. 26-33.