Road Weather Management Program
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Best Practices for Road Weather Management Version 2.0

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Title:

Effects of Weather Conditions on Free-Flow Speeds

Abstract:

This study aims to identify problems in the current speed limitations applied to the national highway in Korea, in order to provide proper driving speed information to the introduction of the Road Weather Information System (RWIS). It is also designed to analyze basic data in order to provide proper speed information by national highway section with consideration for environmental factors, such as weather conditions and slope degree, to ensure driver's safety. Traffic volume and driving speed of clear days and rainy days were compared for a 5km-long section of the Daejeon-Gongju national highway to figure out the impact of weather conditions on driving speeds. Researchers found that the driving speed distribution is not only influenced by weather conditions but also by inclination degree of roads.

Source(s):

Hanbat National University and Korea Institute of Construction Technology (Korea), Eastern Asia Society for Transportation Studies

Date: 2003

Author:

Do, Oh, Kim

Keywords:


Mobility
Rain
Precipitation

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