There is a need for improved monitoring of road and meteorological conditions so that drivers may be warned of hazardous conditions and for traffic management purposes.
Three different aspects concerning road condition and weather monitoring are considered in this project:
- the surface condition of the road (loss of friction),
Systems have been developed to assist in reducing traffic accidents due to bad weather. More precisely, work has been carried out to develop a system architecture and to improve data acquisition techniques, for an integrated road and weather monitoring system, and to demonstrate its benefits for traffic control and management. The main elements include forecast methods, new sensors for road condition and fog monitoring, a new prototype monitoring system, and several data acquisition and data condensation algorithms including risk assessment.
More specifically, these elements are:
a technique to predict the onset of aquaplaning based on extrapolation of radar imagery;
a knowledge based system to provide fog warnings;
prototype microwave, infrared and laser based sensing systems for monitoring the condition of road surfaces;
an improved integrating nephelometer to assess road visibility;
a CROW road weather control centre, denoted as the CCC;
an algorithm to define safe traffic levels in bad weather conditions, based on road, weather and traffic data.
A prototype was made available on 25/08/92
For each of the subjects, general requirements and criteria for monitoring will be determined. Different types of sensor will be studied and prototypes built. Based on the performance of these prototypes, as well as the preliminary investigations, conclusions will be drawn and recommendations for traffic management made.
Special attention will be paid to both traffic engineer and meteorological aspects. Moreover, communication between vehicle and road side will be taken into account.
System architecture, prototypes for crosswind, loss of friction and visibility
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