00815833

Component

https://doi.org/10.3141/1745-07

http://scholar.google.com...hson&publication_year=2001

Mobile video data collection equipment was used to collect data and determine traffic flow and roadway surface conditions during seven winter weather events. Driver visibility was estimated manually. The use of the mobile video data collection equipment in this research and some concerns related to its use during winter weather are discussed. The characteristics of the data are summarized, and the results of a multiple regression statistical analysis presented. Winter weather data were collected and summarized by 15-min time periods. The data included traffic volumes, vehicle speeds, vehicle gaps or headways, visibility, and roadway snow cover. The average winter weather vehicle speed was significantly lower than normal, and multiple regression indicated a relationship among the average off-peak winter weather vehicle speed, the square of hourly volume, visibility, and roadway snow cover. The traffic volume variable in this model was believed to be a surrogate for weather data not collected. The model predicts that visibility below 0.4 km (0.25 mi) and snow cover on the roadway lanes may reduce average off-peak winter weather vehicle speeds by approximately 6.3 and 11.7 km/h (3.9 and 7.3 mph), respectively. It was concluded that the collection of traffic flow and roadway surface data during winter weather events requires the seamless integration, planning, and calibration of a partially video-based automated permanent or semipermanent information system. The ability to assess, quantify, and communicate the potential vehicle speed effects of winter weather could assist drivers with travel decisions and public-sector workers with maintenance decisions.

This paper appears in Transportation Research Record No. 1745, Transportation Work-Zone Safety and Winter Services.

English

p. 53-60

2001

Transportation Research Record

0309072034

Figures (1) ; Photos (3) ; References (13) ; Tables (4)

Automatic data collection systems; Data collection; Decision making; Headways; Mathematical models; Multiple regression analysis; Snow cover; Traffic flow; Traffic speed; Traffic volume; Travel; Traveler information and communication systems; Video cameras; Visibility; Weather conditions; Winter; Winter maintenance

Road condition

Highways; Maintenance and Preservation; Operations and Traffic Management; I62: Winter Maintenance; I73: Traffic Control

TRIS, TRB

Aug 16 2001 12:00AM

• DELIVERING ROAD WEATHER INFORMATION TO THE TRAVELING PUBLIC
• DYNAMIC LATE MERGE-CONTROL CONCEPT FOR WORK ZONES ON RURAL INTERSTATE HIGHWAYS
• EVALUATION OF SPEED DISPLAYS AND RUMBLE STRIPS AT RURAL-MAINTENANCE WORK ZONES
• EVALUATION OF SUPPLEMENTARY TRAFFIC CONTROL MEASURES FOR FREEWAY WORK-ZONE APPROACHES
• FACTORS INDUCING MULTIVEHICULAR COLLISIONS DURING VISIBILITY REDUCED BY SNOWSTORM
• QUALITY ASSURANCE PROGRAM FOR WORK-ZONE TRAFFIC CONTROL
• SEQUENTIAL WARNING-LIGHT SYSTEM FOR WORK-ZONE LANE CLOSURES