A Comprehensive Investigation of Visibility Problems on Highways: Developing Real Time Monitoring and Prediction System for Reduced Visibility and Understanding Traffic and Human Factors Implications

Abdel-Aty, M.; Radwan, Essam; Oloufa, Amr; Rodgers, Michael; University of Central Florida; Georgia Institute of Technology; National Center for Transportation Systems Productivity and Management (U.S.)

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A Comprehensive Investigation of Visibility Problems on Highways: Developing Real Time Monitoring and Prediction System for Reduced Visibility and Understanding Traffic and Human Factors Implications

2015-10-01
By Abdel-Aty, M. ; Radwan, Essam ; Oloufa, Amr ; ...

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Creators:

Abdel-Aty, M. ; Radwan, Essam ; Oloufa, Amr ; Rodgers, Michael

Abdel-Aty, M. ; Radwan, Essam ; Oloufa, Amr ; Rodgers, Michael Less -
Corporate Creators:

University of Central Florida ; Georgia Institute of Technology ; National Center for Transportation Systems Productivity and Management (U.S.)

University of Central Florida ; Georgia Institute of Technology ; National Center for Transportation Systems Productivity and Management (U.S.) Less -
Corporate Contributors:

University Transportation Centers Program (U.S.)
Subject/TRT Terms:

[+]

Environmental Impacts Fog Highway Safety Human Factors Monitoring Real Time Information Traffic Flow Visibility
Resource Type:

Tech Report
Geographical Coverage:

Florida ; United States

Florida ; United States Less -
Corporate Publisher:

United States. Dept. of Transportation. Office of the Assistant Secretary for Research and Technology
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Human Factors;
Abstract:

Visibility is one of the most important impacts weather can have on road systems; weather-related visibility reduction is most often due to fog. Florida is among the top-rated states in the United States with regards to traffic safety problems resulting from adverse visibility conditions caused by fog or smoke (F/S). The reduced visibility also has a negative impact on traffic flow. One of the goals of the research project is develop a low cost deployable fog prediction system. An array of low-cost environmental sensors, arranged at varying levels above the ground surface, could effectively detect the onset of fog and meet or exceed existing performance of traditional and much more expensive technologies. The fog detection algorithm and the updated algorithm is efficient to detect the fog days but it is still likely to make false positive alarms when the day is actually clear. Both weather data and traffic data are collected in this research project to explore traffic flow pattern under reduced visibility conditions. The mean headway and headway variation are significantly higher while the mean speed and volume are significantly lower in fog cases compared to clear cases. There isn’t significant difference in speed variation based on the comparison of a single case. Overall, the impact of reduced visibility on passenger cars is more significant compared to trucks. The mean headway, variation of headway and speed are significantly higher while the mean speed is significantly lower in the fog case compared to the clear case for the cars. In comparison, there isn’t significant difference in the standard deviation of speed for the trucks and the difference of mean speed, headway and standard deviation of headway between fog cases and clear cases for passenger cars are all larger than trucks
Format:

PDF
Funding:

DTRT12GUTC12
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:7ba8b279a07d209861da68b289a81f92f5b2d8b7f5f093e05852d8f979e5b139
Download URL:

https://rosap.ntl.bts.gov/view/dot/36011/dot_36011_DS1.pdf
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A Comprehensive Investigation of Visibility Problems on Highways: Developing Real Time Monitoring and Prediction System for Reduced Visibility and Understanding Traffic and Human Factors Implications

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