Research into the validity of the traffic conflicts technique

Hauer, Ezra; Gårder, Per

doi:10.1016/0001-4575(86)90020-5

Cited by 87 publications

(24 citation statements)

References 2 publications

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“…These issues concern the lack of a consistent definition, their validity as a measure of traffic safety, and the reliability of their associated measurement technique. A number of studies have tried to address these issues ( [10][11][12][13]). Some empirical studies found clear relationships between traffic conflicts and crashes [14].…”

Section: 42mentioning

confidence: 99%

Using Czech TCT to Access Safety Impact of Deceleration Lane at Thai U-Turns

Meel

Satirasetthavee

Kanitpong

et al. 2016

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Abstract. Purpose of this study is to evaluate safety impact of the deceleration lane at the Upstream Zone of at-grade U-turns on 4-lane divided Thai highways. A substantial speed reduction is required by vehicles for diverging and making U-turn, and the deceleration lanes are provided for this purpose. These lanes are also providing a storage space for the U-turning vehicles to avoid unnecessary blockage of through lanes and reduce the potential of rear-end collisions. The safety at the U-turn is greatly influenced by the proper or improper use of the deceleration lanes. Subject to their length, full or partial speed adjustment can occur within the deceleration lane also the road users' behavior is influenced. To assess the safety impact, the four groups of U-turns with the varying length of deceleration lanes were identified.Owing to limitation of availability and reliability of road crash data in Thailand, widely accepted Traffic Conflict Technique (TCT) was used as an alternative and proactive methodology. The U-turns' geometric data, traffic conflicts and volume data were recorded in the field at 8 locations, 8 hours per location.Severity Conflict Rate (SCR) was assessed by applying a weighing factor (based on the severity grades according to the Czech TCT) to the observed conflicts related to the conflicting traffic volumes. A comparative higher value of SCR represents a lower level of safety. According to the results, increase in the functional length of the deceleration lane yields a lower value of SCR and a higher level of the road safety.

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Section: 42mentioning

confidence: 99%

Using Czech TCT to Access Safety Impact of Deceleration Lane at Thai U-Turns

Meel

Satirasetthavee

Kanitpong

et al. 2016

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“…Some observational road safety studies consider pedestrian-motor vehicle conflicts to value roadway countermeasures, because conflict studies can also provide information about crash causes. Traffic conflicts on the basis of empirical evidence was examined and validated by Hauer and Garder [38]. In any case, given the very large number of roads and the meagre resources available for road engineering countermeasures, these with the greatest potential for crash reduction should have priority.…”

Section: Geometric Design Implications To Maximize Pedestrians Safetymentioning

confidence: 99%

An overview of safety effects on pedestrians at modern roundabouts

Granà¹

2011

WIT Transactions on Ecology and the Environment

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Pedestrians are important users of the transportation system, but most guidelines have given them little importance in the geometric design of roads and intersections. In these cases it can be difficult for vehicles and pedestrians to share the road safely, particularly at intersections where vehicle-pedestrian conflicts (and the risk of vehicle-pedestrian crashes) can be a frequently recurring situation even with low pedestrian volume. In a sustainable safety vision road system planning and design must include engineering choices that help to improve the sharing of road space between vehicles and pedestrians, as well as for other vulnerable users. It is known that modern roundabouts are safer than other intersection forms both for effects on speeds and for effects on conflicts between road users; several road authorities, indeed, have foreseen to convert specific types of intersections into roundabouts. Summarizing international experience with roundabouts and pedestrians, the paper provides a review of the existing literature dealing with pedestrian safety and accessibility issues at roundabouts. First, safety aspects at modern roundabouts are presented, followed by a brief explanation of the effects of roundabouts on pedestrian safety documented in the scientific literature. At last, this research provides an overview of the current state of practice and implications in the roundabout design to maximize their potential with regard to safety pedestrians.

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“…This relationship has been used extensively in various studies, such as comparing various geographic areas, drivers on highways, or the prediction of accidents through traffic conflicts counts. Examples of such applications can be found in (Hauer and Garder, 1986;Trinca et al, 1988;Garder, 1989;Wilson et al, 1992;and NSC Accident Facts, 2000).…”

Section: Indexed African Journals Online: Wwwajolinfomentioning

confidence: 99%