skip navigation

PUBLICATIONS

Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 

NCJ Number: 63120 Find in a Library
Title: FOG DETECTION ON MOTORWAYS - A PROGRESS REPORT
Journal: POLICE RESEARCH BULLETIN  Issue:32  Dated:(SPRING 1979)  Pages:19-29
Author(s): R F SYMS
Corporate Author: Great Britain Home Office
United Kingdom
Date Published: 1979
Page Count: 11
Sponsoring Agency: Great Britain Home Office
London, SW1H 9AT, England
Format: Article
Language: English
Country: United Kingdom
Annotation: THIS BRITISH ARTICLE DESCRIBES THE POLICE REQUIREMENT FOR AN ACCURATE AND RELIABLE EARLY WARNING SYSTEM FOR FOG MONITORING ON HIGHWAYS AND OUTLINES THE DEVELOPMENT OF THE SYSTEM AND SUBSEQUENT IMPROVEMENTS.
Abstract: POLICE INTERVENTION CAN POTENTIALLY MAKE MOTORWAYS SAFER BY CHANGING THE BEHAVIOR OF DRIVERS. HOWEVER, RELIABLE AND UP TO DATE INFORMATION ON VISIBILITY MUST BE AVAILABLE AT POLICE CONTROL ROOMS IF THE BEST USE IS TO BE MADE OF THE LIMITED POLICE RESOURCES. EQUIPMENT TO MONITOR VISIBILITY WAS DEVELOPED UNDER CONTRACT TO THE HOME OFFICE AND CONSISTED OF TWO DEVICES: (1) A POINT VISIBILITY METER (PVM) WHICH MEASURES THE DENSITY OF FOG AT THE CENTER OF THE INSTRUMENT AND (2) A BACKGROUND LIGHT METER (BLM) WHICH IS SIMILAR TO THOSE USED IN PHOTOGRAPHY. THESE TWO INSTRUMENTS ARE USED IN CONJUNCTION SO THAT THE CALCULATED VISIBILITY PROPERLY REFLECT THE PERCEPTION OF OBJECTS IN FOG. TRIALS WERE CONDUCTED TO ASSESS BOTH SCIENTIFIC AND OPERATIONAL ASPECTS OF THE SYSTEM. PRELIMINARY TRIALS LED TO A CLEAR SET OF RECOMMENDATIONS FOR FUTURE FOG WARNING SYSTEMS INCLUDING AN UPDATED SIMPLIFIED DISPLAY, AUTOMATIC RECORDING OF DATA FOR ANALYSIS, RECORDING OF OTHER METEOROLOGICAL DATA SUCH AS WIND SPEED, AND A TRAFFIC MONITORING FACILITY TO STUDY RELATIONS BETWEEN SAFE DRIVING SPEED AND VISUAL RANGE. THE ENHANCED SYSTEM, WHEN OPERATIONAL, WILL OFFER IMPROVED PERFORMANCE AND WILL PROVIDE INFORMATION ON TRAFFIC BEHAVIOR, AND MONITOR THE EFFECTIVENESS OF POLICE TACTICS IN ACHIEVING A SAFE FLOW TO TRAFFIC IN THE FOG. TABULAR DATA AND REFERENCES ARE PROVIDED. (MJW)
Index Term(s): Computer aided operations; Great Britain/United Kingdom; Traffic control and direction; Traffic control equipment
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=63120

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.