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    Operating Speed Prediction Models by Vehicle Type on Two-Lane Rural Highways in Indian Hilly Terrains

    Source: Journal of Transportation Engineering, Part A: Systems:;2022:;Volume ( 148 ):;issue: 003::page 04022001
    Author:
    Jaydip Goyani
    ,
    Purvang Chaudhari
    ,
    Shriniwas Arkatkar
    ,
    Gaurang Joshi
    ,
    Said M. Easa
    DOI: 10.1061/JTEPBS.0000644
    Publisher: ASCE
    Abstract: The present study aims to develop vehicle type-wise operating-speed prediction (OSP) models for heterogeneous traffic on two-lane rural highways in Indian hilly terrains. For the present study, 27 curves with varying geometric characteristics located along the National Highway (NH-953) connecting Netrang and Rajpipla in the western state of Gujarat, India, were selected. Speed data were collected using radar guns at three curve locations (entry point, midpoint, and exit point) in each travel direction for three dominant types of vehicles: motorized two-wheelers (2W), cars, and heavy commercial vehicles (HCVs). OSP models were developed for different vehicle types at three curve points using the backward elimination stepwise regression (BSR) technique. The results revealed that the preceding curve point’s operating speed, curve length, and tangent length positively affected operating speed. In contrast, deflection angle, curve sharpness, and grade had adverse effects. The curve geometric characteristics had the most negligible impact on the operating speed of 2W and a significant effect on HCV. Among all the curve-related aspects, curve length was the most significant variable and affected the speed of all three vehicle types, followed by curve sharpness. Further, the developed OSP models were applied to the other hilly terrain to check the transferability of the model. As an important outcome, the developed OSP models were used to evaluate geometric design consistency. This highlights the need for geometric and traffic-calming measures to improve highway operating-speed consistency and driver safety.
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      Operating Speed Prediction Models by Vehicle Type on Two-Lane Rural Highways in Indian Hilly Terrains

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4282873
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    • Journal of Transportation Engineering, Part A: Systems

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    contributor authorJaydip Goyani
    contributor authorPurvang Chaudhari
    contributor authorShriniwas Arkatkar
    contributor authorGaurang Joshi
    contributor authorSaid M. Easa
    date accessioned2022-05-07T20:46:06Z
    date available2022-05-07T20:46:06Z
    date issued2022-01-10
    identifier otherJTEPBS.0000644.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4282873
    description abstractThe present study aims to develop vehicle type-wise operating-speed prediction (OSP) models for heterogeneous traffic on two-lane rural highways in Indian hilly terrains. For the present study, 27 curves with varying geometric characteristics located along the National Highway (NH-953) connecting Netrang and Rajpipla in the western state of Gujarat, India, were selected. Speed data were collected using radar guns at three curve locations (entry point, midpoint, and exit point) in each travel direction for three dominant types of vehicles: motorized two-wheelers (2W), cars, and heavy commercial vehicles (HCVs). OSP models were developed for different vehicle types at three curve points using the backward elimination stepwise regression (BSR) technique. The results revealed that the preceding curve point’s operating speed, curve length, and tangent length positively affected operating speed. In contrast, deflection angle, curve sharpness, and grade had adverse effects. The curve geometric characteristics had the most negligible impact on the operating speed of 2W and a significant effect on HCV. Among all the curve-related aspects, curve length was the most significant variable and affected the speed of all three vehicle types, followed by curve sharpness. Further, the developed OSP models were applied to the other hilly terrain to check the transferability of the model. As an important outcome, the developed OSP models were used to evaluate geometric design consistency. This highlights the need for geometric and traffic-calming measures to improve highway operating-speed consistency and driver safety.
    publisherASCE
    titleOperating Speed Prediction Models by Vehicle Type on Two-Lane Rural Highways in Indian Hilly Terrains
    typeJournal Paper
    journal volume148
    journal issue3
    journal titleJournal of Transportation Engineering, Part A: Systems
    identifier doi10.1061/JTEPBS.0000644
    journal fristpage04022001
    journal lastpage04022001-13
    page13
    treeJournal of Transportation Engineering, Part A: Systems:;2022:;Volume ( 148 ):;issue: 003
    contenttypeFulltext
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