Necessity Analysis of Inside Shoulder Setting in Multi-lane Freeway with Traffic Simulation Method

Zhong, Lexuan; Li, Xiuwen; Wu, Keman

doi:10.1007/978-3-642-25349-2_79

Cited by 1 publication

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“…The lane is also used as an emergency lane for rescue vehicles and as a temporary stopping place for maintenance and repair vehicles in the inner lane to avoid traffic accidents caused by vehicles breaking down or running out of fuel in the inner lane crossing multiple lanes on the right shoulder. Zhong et al applied the acceptable clearance theory [6] and traffic simulation methods [9] to analyze the necessity of setting the hard shoulder on the left side in terms of both operational efficiency and traffic safety. Angela E. Kitali et al [10] studied the effect of left shoulder width on the safety of the innermost lane and found that broader shoulders significantly reduced the accident rate of the innermost lane.…”

Section: Literature Review 21 Study Of Left Hard Shoulder On Highwaymentioning

confidence: 99%

“…Ref. [9] used VISSIM software to set up a one-way four-lane intertwined zone and simulated a single vehicle changing lanes continuously to the right hard shoulder. The results showed that a single vehicle changing lanes continuously can have an impact on the speed of other vehicles and lead to an increased potential risk of collisions, thus illustrating the need for a left hard shoulder to reduce lane changes on multi-lane freeways.…”

Section: Theoretical and Practical Applicationsmentioning

confidence: 99%

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Research on the Safety of the Left Hard Shoulder in a Multi-Lane Highway Based on Safety Performance Function

Zhao

et al. 2022

Sustainability

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The left hard shoulder plays an important role in the event of an emergency on the inside of a multi-lane highway, but past studies have not been able to clarify the criteria for its installation or quantify the safety impact of its installation on the left side. In order to study the influence of the left hard shoulder on the safety of vehicles traveling on multi-lane highways, based on past studies that only studied the situation of four-lane highways, this paper firstly constructs a multi-lane highway simulation model under different numbers of lanes based on the VISSIM traffic simulation and uses Surrogate Safety Assessment Model (SSAM) to study the conflict characteristics of multi-lane highway vehicles under different numbers of lanes. Based on the above findings, this paper introduces the Safety Performance Function (SPF) to construct a multi-lane freeway accident prediction model, calibrates the model by adding the indexes affected by the left side hard shoulder to the basic prediction mode, and uses the historical accident data of the Badou-Shihu section of the Guangdong Northern Second Ring Highway as the basis to study the differences in accident rates of the investigated section before and after setting the left hard shoulder. The study showed that the average Time to Collision (TTC) increased by 57.2%, Maximum Deceleration (MaxD) increased by 19.2%, and Delta Speed (DeltaS) increased by 15.3% after setting hard shoulders on the left side of multi-lane freeways, and traffic conflicts on multi-lane freeways were significantly reduced, and safety was improved considerably. In addition, the rear-end conflict rate decreased by 0.17%, 0.75%, and 4.6% after setting hard shoulders on the left side of one-way three, four, and five lanes, respectively, indicating that hard shoulders on the left side are the most effective in improving the safety of one-way five-lane freeways. The accident prediction results show that within the reasonable setting range of the left hard shoulder width (0~4 m), the accident rate decreases by about 1.5% for every 0.5 m increase if only the influence of the left hard shoulder width is considered. Without considering other factors, increasing the width of the hard shoulder on the left side can reduce the number of accidents. This indicates a significant safety improvement for a one-way five-lane highway after setting the hard shoulder on the left side, and the conclusion is consistent with the simulation results. In this paper, based on past research, the research object is extended to one-way three-, four-, and five-lane highways. The findings of this paper can help the road authorities develop specifications for installing hard shoulders on the left side of multi-lane freeways and adopt strategies to improve the traffic safety level of multi-lane freeways. In addition, the models and methods used in this paper can also help build a framework for future intelligent networked vehicle avoidance systems and promote the development of intelligent networked technologies.

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Section: Literature Review 21 Study Of Left Hard Shoulder On Highwaymentioning

confidence: 99%

Section: Theoretical and Practical Applicationsmentioning

confidence: 99%

Research on the Safety of the Left Hard Shoulder in a Multi-Lane Highway Based on Safety Performance Function

Zhao

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

Necessity Analysis of Inside Shoulder Setting in Multi-lane Freeway with Traffic Simulation Method

Cited by 1 publication

References 0 publications

Research on the Safety of the Left Hard Shoulder in a Multi-Lane Highway Based on Safety Performance Function

Research on the Safety of the Left Hard Shoulder in a Multi-Lane Highway Based on Safety Performance Function

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