Analyzing the Influence of Aggregate Properties on Stopping Distance on Truck Escape Ramps

Qin, Pinpin; Chen, Chuice; Guo, Huan-liang; Han, Yaqi; Meng, Qiang

doi:10.1007/s12204-019-2062-x

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…e results of this study revealed the experiences of state DOTs regarding design principles, operation and maintenance practices, and determination of the location of emergency escape ramps [12]. Moreover, there are various studies in the literature focusing on determining the location of emergency escape ramps [13,14], the design for approaching the ramp [15], analysis of incidents in emergency escape ramps and legal risk mitigation [16], and analysis of aggregate property influences on stopping distance on emergency escape ramps [17].…”

Section: Literature Reviewmentioning

confidence: 88%

“…Unscientific design and location are often cases in which emergency escape ramps are questioned, which is often affected by severe deceleration, improper granulation, uneven friction, junction angle, improper length, width, etc. [17][18][19][20]. Emergency escape ramps often exist because of freight trucks and in the event that the brakes fail, and vehicles such as empty trucks, other light trucks, and passing cars that may enter the ramps can cause improper use of ramps [21][22][23].…”

Section: Literature Reviewmentioning

confidence: 99%

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Location of Emergency Escape Ramps on Two-Lane Rural Highways Based on the Fuzzy Multicriteria Decision-Making Method

Heidarian

Kordani

Sarkar

et al. 2022

Journal of Engineering

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Today, the lack of practical research is one of the most important concerns worldwide, and location, which is an important issue in most projects, has received less attention from experts. In this study, the location criteria of emergency escape ramps were examined, and according to the Myers formula, the temperature-distance diagram along the route was obtained. Also, the speed of vehicles entering the escape ramp was examined according to the American Association of State Highway and Transportation Officials (AASHTO) in the proposed options that were obtained from the experts. Then, 3 general criteria and 16 subcriteria were classified, and finally, the importance of criteria was examined by the fuzzy analytic hierarchy process (F-AHP), and the high-priority options were illustrated using the fuzzy technique for order performance by similarity to ideal solution (F-TOPSIS). The proposed options were evaluated and prioritized for an emergency escape ramp on the two-lane rural highways of Salavat Abad village pass of Sanandaj city, Kurdistan Province, Iran. The results showed that the technical criteria with more than 69% among the general criteria and subcriteria of the percentage of longitudinal slope, longitudinal slope length, and vehicle design speed were the most important factors influencing the location of an emergency escape ramp. Moreover, among the proposed options, the four options 3, 4, 5, and 6 had the highest score, and option 6 (Kurkur turn (2)) was identified as the most priority location for implementing the emergency escape ramp.

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Section: Literature Reviewmentioning

confidence: 88%

Section: Literature Reviewmentioning

confidence: 99%

Location of Emergency Escape Ramps on Two-Lane Rural Highways Based on the Fuzzy Multicriteria Decision-Making Method

Heidarian

Kordani

Sarkar

et al. 2022

Journal of Engineering

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“…Zhang et al 11 established a two-dimensional discrete element model for an aggregate-wheel to determine a design method for arrester bed length. Chen 12 and Qin et al 13 , 14 used a two-dimensional particle flow code (PFC 2D ) and TruckSim to jointly establish an aggregate-wheel two-dimensional discrete element model and to analyze the effects of aggregate type, aggregate diameter, arrester bed grade, and entry velocity on the stopping distance. Liu et al 15 established a two-dimensional aggregate-wheel discrete element model based on the discrete element method to study the thickness, length, and particle material selection of an arrester bed aggregate, and to provide corresponding recommended values.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional discrete element simulation of the runaway vehicle deceleration process on the arrester bed of truck escape ramps

Qin

et al. 2020

Science Progress

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Due to imperfect design norms and guidelines for China’s truck escape ramp, previous studies have not been able to reflect the effect of wheel subsidence process on the deceleration of runaway vehicles. A discrete element method was used to establish an aggregate discrete element and a wheel discrete element. The three-dimensional discrete element model for an aggregate-wheel combination was established based on a particle flow code in three dimensions on a software platform using the “FISH” language. The microscopic parameters of the aggregate discrete element particles and wheel discrete element particles were calibrated using a simulated static triaxial compression test and real vehicle test data, respectively. Four sets of numerical simulation tests were designed for analyzing the influence of the aggregate diameter, grade of the arrester bed, truckload, and entry speed on the wheel subsidence depth and stopping distance of runaway vehicles. The results indicate that the smaller the aggregate diameter and entry speed and the greater the truckload and grade of the arrester bed, the more easily the wheel falls into the gravel aggregate, the better the deceleration effect, and the smaller the stopping distance. As the wheel subsidence depth increases, the speed at the unit stopping distance decreases more quickly. The maximum subsidence depth mainly depends on the truckload. The research results can provide a theoretical basis for the design of the arrester bed length and the thickness of the aggregate pavement in a truck escape ramp.

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Improving performance of emergency escape ramps (EERs)

Besiktepe

Valdes-Vasquez

Strong

et al. 2020

Journal of Transportation Safety & Security

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Analyzing the Influence of Aggregate Properties on Stopping Distance on Truck Escape Ramps

Cited by 4 publications

References 1 publication

Location of Emergency Escape Ramps on Two-Lane Rural Highways Based on the Fuzzy Multicriteria Decision-Making Method

Location of Emergency Escape Ramps on Two-Lane Rural Highways Based on the Fuzzy Multicriteria Decision-Making Method

Three-dimensional discrete element simulation of the runaway vehicle deceleration process on the arrester bed of truck escape ramps

Improving performance of emergency escape ramps (EERs)

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