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In Finland, a road weather information system with variable speed limit signs was projected to yield a benefit-to-cost ratio ranging from 0.6:1 to 1.6:1 depending on the influence of the system on vehicle speeds and crash rate.
FINDINGS
The benefit-cost ratio reflects the ratio between the socio-economic impacts of the system and total expenses of the system. The remunerative rate of interest indicates how effective the…
Content type
Date Posted
01/15/2001
Taxonomy (ARC-IT)
Roadway Automated Treatment (MC03),
Traffic Information Dissemination (TM06),
Weather Information Processing and Distribution (WX02),
Spot Weather Impact Warning (WX03),
Variable Speed Limits (TM20)
Geolocation links
In Finland, road weather information posted on dynamic message signs was well perceived and remembered by surveyed drivers; 90 percent deemed variable speed limit signs useful.
FINDINGSSurvey results indicated that the signs were well perceived and remembered, with 90 percent of survey drivers deeming the variable speed limit signs useful.
Content type
Date Posted
01/15/2001
Taxonomy (ARC-IT)
Roadway Automated Treatment (MC03),
Traffic Information Dissemination (TM06),
Weather Information Processing and Distribution (WX02),
Spot Weather Impact Warning (WX03),
Variable Speed Limits (TM20)
Geolocation links
In Finland, a road weather information system with variable speed limit signs was projected to decrease the average vehicle speed by 0.4 to 1.4 percent and reduce the annual crash rate by 8 to 25 percent.
FINDINGSBecause absolute values could not be used, three assessments (pessimistic, probable and optimistic) of average speeds and accident rates were made. Based upon investment costs of roughly $1.…
Content type
Date Posted
01/15/2001
Taxonomy (ARC-IT)
Roadway Automated Treatment (MC03),
Traffic Information Dissemination (TM06),
Weather Information Processing and Distribution (WX02),
Spot Weather Impact Warning (WX03),
Variable Speed Limits (TM20)
Geolocation links
INTELLIGENT TRANSPORTATION SYSTEMS JOINT PROGRAM OFFICE
1200 New Jersey Avenue, SE
Washington, DC 20590
