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- W649156768 abstract "This research develops a random parameter count model of crash frequency on freeways with a speed limit of 110 km/h in Korea and performs a comparison between time periods (daytime, nighttime, twilight, and the whole 24 hour period). Data for crashes in 2007-2010, excluding vehicle factors such as engine overheating and malfunction in damping device and human factors such as drunk driving and dosing off at the wheel, was drawn from Korea freeway crash data. The results show several factors having random effects on crashes: traffic share of light vehicles, number of lanes, urban area, and foggy area. While some factors are statistically significant regardless of the time period (e.g., traffic share of light vehicles, number of lanes, urban area, frequent fog in area, and number of days with snowfall), some factors have statistical effects only during certain time periods (e.g., number of interchanges/junctions and number of bridges during daytime, traffic share of heavy vehicles during nighttime and the whole 24 hour period, and short tangent (<1,421 m) and number of crest vertical curves during twilight). The results indicate that the effect of roadway geometrics on crash frequency differs by time of day which can be used in driver information systems to supply different information to drivers about the road ahead based on time of day. For example, during daytime drivers need more information about upcoming interchanges/junctions. The results indicate that roadway design should try to avoid combining horizontal and sag vertical curves." @default.
- W649156768 created "2016-06-24" @default.
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- W649156768 date "2013-01-01" @default.
- W649156768 modified "2023-09-25" @default.
- W649156768 title "Analysis of Factors Affecting Freeway Traffic Crash Frequency Under Different Light Conditions with Random Parameter Count Models" @default.
- W649156768 hasPublicationYear "2013" @default.
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