01088599

Component

https://doi.org/10.3141/2055-15

http://scholar.google.com...saki&publication_year=2008

A road visibility information system (RVIS) was developed that uses images transmitted by multiple closed-circuit television (CCTV) cameras as road visibility information. Feasibility studies in the daytime during the winters of 2005 to 2006 and 2006 to 2007 were performed on Japan's national routes 230 and 231. During those two winters, the RVIS calculated visibility scale and road visibility index (RVI) automatically, accurately, continuously, and in a timely manner from road images recorded by multiple CCTV cameras. The RVIS processed 90% of the images transmitted by 14 CCTV cameras. The RVIS provided areawide visibility information in many formats and through many kinds of media and devices. On the basis of stored road visibility data, the finding was a high correspondence between the RVI and the subjective visibility evaluation for the same road images. In addition, this study demonstrates that the RVI monitoring website and e-mail alerts can speedily and reliably inform road administrators of snowstorm-induced poor visibility. The RVIS has the potential to collect data on road visibility reliably during daytime using images transmitted by multiple CCTV cameras. However, it is necessary to improve data collection at night and to capture still images accurately and quickly.

01114242

English

pp 128-138

2008

Transportation Research Record: Journal of the Transportation Research Board

9780309113250

Print

Figures (7) ; References (9) ; Tables (4)

Closed circuit television; Data collection; Daylight; Feasibility analysis; Night visibility; Snowstorms; Visibility distance; Winter maintenance

Reduced visibility; Road visibility information systems

Japan

Highways; Maintenance and Preservation; I62: Winter Maintenance

TRIS, TRB, ATRI

Jan 29 2008 5:09PM

• Automated Speed Photo Enforcement Effects on Speeds in Work Zones
• Benefit–Cost Analysis of Weather Information for Winter Maintenance: A Case Study
• Current Asset Management Practices Applied to Pavement Markings
• Decision Tree for Pretreatments for Winter Maintenance
• Development of New Performance Measure for Winter Maintenance by Using Vehicle Speed Data
• Development of Traffic Delay Assessment Tool for Short-Term Closures on Urban Freeways
• Dynamic Late Lane Merge System at Freeway Construction Work Zones
• Effects of Adverse Weather on Traffic Crashes: Systematic Review and Meta-Analysis
• Implementing Semipermanent High-Mast Lighting for Highway Construction Projects
• Methodology for Computing Delay and User Costs in Work Zones
• Pavement Marking Retroreflectivity Inspection Data: A Weibull Analysis
• Performance Evaluation of Semipermanent High-Mast Lighting for Highway Construction Projects
• Recycling of Salt-Contaminated Storm Water Runoff for Brine Production at Virginia Department of Transportation Road-Salt Storage Facilities
• Review and Development of Recommended Minimum Pavement Marking Retroreflectivity Levels
• Scheduling Work Zones for Highway Maintenance Projects: Considering a Discrete Time–Cost Relation