Analyzing the influence of median cross-section design on highway safety using vehicle dynamics simulations

Stine, Jason Spencer; Hamblin, Bridget C.; Brennan, Sean; Donnell, Eric T.

doi:10.1016/j.aap.2010.04.018

Cited by 27 publications

(13 citation statements)

References 1 publication

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“…Using simulation modeling in the case of traffic incidents is another example which helps designers to determine the best locations for installing fire extinguishers equipment [11]. Simulation approach is also utilized to analyze the performance of road equipment designing on roads [13] and may be a good tool for making tactical and strategic planning [14]. Combining simulation and optimization techniques in the process of decision making and management [15], rural road network management [16], and selection and construction problem [17] is also found in the literature, which is the basis of the conceptual framework of procedure followed in this research work.…”

Section: Computer Simulationmentioning

confidence: 99%

Developing a Chaotic-Simulation Based Model for Ranking High Selected Network Links in Hazardous Material Transportation

Mahmoudabadi

2014

Modelling and Simulation in Engineering

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Hazardous material transportation is one of the main concerns due to the nature of hazardous materials and their incident impacts. In general, transport risk is a main attribute to develop mathematical models for hazardous material routing problem as well as network designing or improving road safety. This paper presents a chaotic-simulation based model to determine the high selected links to improve road network quality for hazardous material transportation, in which risk is considered as a chaotic variable over the network whereas a simulation technique has been applied to cover a wide range of selecting paths. A real road network, consists of fifty-nine nodes and eighty two-way edges, is used for running the mathematical model and checking validation. Due to the large amounts of hazardous material transported by trucks, the proposed methodology is focused on fuel transportation, and high selected list of edges (links) has been obtained to improve road safety. Sensitivity analysis revealed that using different seeds for generating transport risk has no significant effects on finding the most frequent paths and high selected edges.

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Section: Computer Simulationmentioning

confidence: 99%

Developing a Chaotic-Simulation Based Model for Ranking High Selected Network Links in Hazardous Material Transportation

Mahmoudabadi

2014

Modelling and Simulation in Engineering

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“…Median slopes of 1:4, 1:5, and 1:6 [6] were investigated. In order to manifest the effect of only the median slope, other geometric parameters, e.g., median width and median depth were kept constant.…”

Section: Simulation Parametersmentioning

confidence: 99%

“…Based on VDA, further research used both Finite Element Analysis (FEA) software and Multi-body Dynamics software to simulate a vehicle driving into the median, from which the guideline of optimal median barrier placement was drafted [5]. A trade-off was found by Stine et al between designing a median to prevent vehicular rollover and designing it for preventing median crossovers, after a total run of 111,132 simulations in CarSim TM [6]. Reliability of applying CarSim TM in such research was validated by Uzunsoy et al [7] by comparing the result of simulation with that of physical off-road tests.…”

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confidence: 99%

Analysis of Highway Sloped Median Performance for Containment of Errant Vehicles

Olatunbosun¹,

He²,

Shitta-Bey³

2018

WJET

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Errant vehicles occur as a result of the driver losing control of the vehicle. This may be due to sudden illness, dozing off or skidding while attempting a manoeuvre. In containing such an errant vehicle on a highway, the priority is to avoid collision with other vehicles. A sloped highway median provides a run-off area for such vehicles where the vehicle can be slowed down and stopped without the danger of being re-directed into the path of other vehicles as may occur with edge barriers. Here, the effect of a containment barrier at the bottom of the sloped median is studied with a view to prevent the vehicle from being redirected outside the median after colliding with the barrier. The focus of this work is on the change of kinematic states due to the collision, so a momentum-based vehicle collision analysis is developed, with the collision energy loss related to the vehicle stiffness being considered by coefficient of restitution. The average maximum lateral displacements post-collision are read from the diagram of vehicle x-y trajectories. In this way, the most suitable median slope 1:6 is selected.

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“…The experimental results indicated that the mean speed obtained from simulator tests was insubstantial agreement with field tests and that both displayed a normal distribution. Stine 15 used the driving simulator for highway median designs, and vehicle trajectory data were obtained through driving simulations. The research results indicated that the cross-sectional geometry of median had a relationship with the frequency of access-related crashes.…”

Section: Introductionmentioning

confidence: 99%

Modeling of highway access weight: Effects on speed and lateral variation

Lü

Wang

et al. 2015

Advances in Mechanical Engineering

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Highway access points are places where motor vehicles turn off the roadway onto arterial roads. Numerous conflict points exist at highway access points as a result of access and through traffic. Higher speeds and lateral offset variation cause greater risk of potential crashes. This research aimed to formulate a new method of access weight calculation that would show the speed and lateral offset variation characteristics of various access types under the same traffic conditions. Seven access types commonly found on highways in China were considered and analyzed for their safety performance. Data for a vehicle's lateral offset, speed, acceleration, and deceleration rate were collected by means of a driving simulation method. Both field tests and simulation tests were compared to validate the accuracy of the simulation results from the viewpoint of vehicle speed and trajectory. Finally, access density, derived from the proposed access weighting model, was analyzed and correlated with crash rates on National Highway G205 (South Nanjing section). Spearman correlation results showed that the access rated crash rates have a high correlation. The proposed access weight calculation method shows promise for its application in safety evaluation, access design, and reconstruction.

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Analyzing the influence of median cross-section design on highway safety using vehicle dynamics simulations

Cited by 27 publications

References 1 publication

Developing a Chaotic-Simulation Based Model for Ranking High Selected Network Links in Hazardous Material Transportation

Developing a Chaotic-Simulation Based Model for Ranking High Selected Network Links in Hazardous Material Transportation

Analysis of Highway Sloped Median Performance for Containment of Errant Vehicles

Modeling of highway access weight: Effects on speed and lateral variation

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