Safety Index for evaluation of urban roundabouts

Riccardi, Maria Rella; Augeri, Maria Grazia; Galante, Francesco; Mauriello, Filomena; Nicolosi, Vittorio; Montella, Alfonso

doi:10.1016/j.aap.2022.106858

Cited by 17 publications

(18 citation statements)

References 31 publications

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“…The predominant crash types that occurred over this 6-month period were two entry-circulating, two circulating sideswipes, and one loss-of-control (according to Ohio of Transportation (DOT) crash data provided by the GPD Group). This case study supports research findings that the safety performance of multi-lane roundabouts emerges from the whole system interaction of design elements, which include adherence to various key geometric safety principles, and is not predicated on singular design elements (6)(7)(8)(12)(13)(14).…”

Section: Resultssupporting

confidence: 81%

“…Some researchers have concluded that multi-lane roundabouts are inherently unsafe and therefore inadvisable (11), whereas other researchers indicate that it is not simply the presence of multi-lanes, but rather the combined effects of different design elements of the multi-lane roundabout that influence driver behavior and determine safety performance (6)(7)(8)(12)(13)(14).…”

Section: International Safety Researchmentioning

confidence: 99%

“…Recent Italian research has led to the development of a safety index model for urban roundabouts for use in roadway safety assessment procedures to include different design inputs: geometric variables, signing, markings, road environment, pavement conditions, and traffic flow data (12). U.K., U.S., and Italian research found that incorrect driver behavior was caused by the combined effects of geometry and other design elements, such as signs and pavement markings, giving drivers poor or misleading cues on how to negotiate roundabouts (8,(12)(13)(14).…”

Section: International Safety Researchmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

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Effects of Phi and View Angle Geometric Principles on Safety of Multi-Lane Roundabouts

Johnson¹

2023

Transportation Research Record: Journal of the Transportation R

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Conventional intersections that have been replaced by multi-lane roundabouts have experienced a substantial reduction in both injuries and fatal crashes. Property-damage-only (PDO) crashes have also been reduced at some of these roundabouts. However, some multi-lane roundabouts have experienced a significant increase in PDO crashes. The question arises as to why some U.S. multi-lane roundabouts have substantially higher numbers of PDO crashes while other outwardly similar roundabouts do not. In this paper, we examine the hypothesis that the cause of the higher numbers of PDO crashes at some U.S. multi-lane roundabouts is driver confusion, owing to the lack of adherence to horizontal geometric safety design principles related to entry angles. We review research and explore three case studies where adherence to the safety principles related to entry angles—Phi and left view angle—contributed to improved safety.

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Section: Resultssupporting

confidence: 81%

Section: International Safety Researchmentioning

confidence: 99%

Section: International Safety Researchmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Phi and View Angle Geometric Principles on Safety of Multi-Lane Roundabouts

Johnson¹

2023

Transportation Research Record: Journal of the Transportation R

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“…Thirdly, the roadside observation study may have been limited by the manual counting of cyclists’ riding behaviors by observers, potentially leading to omissions in the data. Due to safety concerns for the observers, we did not investigate the roundabouts, even though they are considered intersections that are difficult to navigate for cyclists and have a significant impact on their safety [ 44 ]. Future studies at roundabouts could be possible through video or other formats.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Risky Riding Behavior Characteristics of the Related Road Traffic Injuries of Electric Bicycle Riders

Huang

Song

Xie

et al. 2023

IJERPH

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Electric bicycle (EB) riders, being vulnerable road users (VRUs), are increasingly becoming victims of road traffic injuries (RTIs). This study aimed to determine the current status and epidemiological characteristics of RTIs among EB riders through a questionnaire survey and roadside observations in Shantou to provide a scientific basis for the prevention and control of electric bicycle road traffic injuries (ERTIs). A total of 2412 EB riders were surveyed, and 34,554 cyclists were observed in the study. To analyze the relationship between riding habits and injuries among EB riders, chi-square tests and multi-factor logistic regression models were employed. The findings reveal that the prevalence of ERTIs in Shantou was 4.81%, and the most affected group was children under 16 years old, accounting for 9.84%. Risky behavior was widespread among EB riders, such as the infrequent wearing of safety helmets, carrying people on EBs, riding on sidewalks, and listening to music with headphones while bicycling. Notably, over 90% of those who wore headphones while bicycling engaged in this risky behavior. The logistic regression analysis showed that honking the horn (odds ratio (OR): 2.009, 95% CI: 1.245–3.240), riding in reverse (OR: 4.210, 95% CI: 2.631–6.737), and continuing to ride after a fault was detected (OR: 2.010, 95% CI: 1.188–3.402) all significantly increased the risk of ERTIs (all p < 0.05). Risky riding behavior was significantly less observed at traffic intersections with traffic officers than at those without (all p < 0.001).

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Efficient Road Structural Design And Traffic Accident Analysis Using Supervised Learning Algorithms

Hruthik,

Tharun,

Prasad

et al. 2023

2023 International Conference on Computer Communication and Informatics (ICCCI)

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Safety Index for evaluation of urban roundabouts

Cited by 17 publications

References 31 publications

Effects of Phi and View Angle Geometric Principles on Safety of Multi-Lane Roundabouts

Effects of Phi and View Angle Geometric Principles on Safety of Multi-Lane Roundabouts

Analysis of Risky Riding Behavior Characteristics of the Related Road Traffic Injuries of Electric Bicycle Riders

Efficient Road Structural Design And Traffic Accident Analysis Using Supervised Learning Algorithms

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