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- W3029336976 abstract "Truck traffic has significant impact on traffic operations and safety. Especially, safety concerns due to truck traffic continue to draw increasing attention of transportation engineers and policy makers who are proposing a number of practical strategies such as lane restrictions and exclusive facilities. The key aspect of all these strategies lies in separating trucks from cars to create more homogeneous traffic conditions. Earlier research demonstrated merits of these strategies whereas very limited findings on their safety impacts have been reported so far. The objective of this study is to examine the impact of truck-auto separation on highway crash severity. Specifically, the safety impact of separation through dual-dual roadways, a system that simultaneously provide separated car-only lanes and mixed traffic flow lanes, is of great interest since this kind of system was barely studied in the past. In order to achieve this goal, a detailed crash data set from a major highway section with dual-dual roadways for several years was examined. Comparative analyses were conducted and a statistical model have been developed. The results of this study show that the deployment of the dual-dual roadways with car-only lanes has statistically significant impact on crash severity. The model results show higher risk of having injury crashes in dual- dual lanes (both inner and outer lanes) compared with regular mix traffic lanes. This finding suggests that other than considering crash frequency as a measure of safety, crash severity should also be considered to fully assess the performance of the truck-auto separation strategies similar to the one studied in this paper. However, other than the impact of the truck-auto separation, these findings can be (partially) changed due to other factors that are not accounted for by the model, such as the actual operational speed when crash occurred, trucks being loaded or empty, etc. In short, due to the unavailability of detailed data, current results need to be considered with great care and should be considered preliminary at best. More research with better and more detailed data is needed to be able to make any final conclusion and recommendation." @default.
- W3029336976 created "2020-06-05" @default.
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- W3029336976 date "2019-01-01" @default.
- W3029336976 modified "2023-09-23" @default.
- W3029336976 title "Impact of Truck-Auto Separation on Crash Severity" @default.
- W3029336976 hasPublicationYear "2019" @default.
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