Methodology to Analyze Sun Glare Impact on Highway under Prolonged Exposure

Jurado-Piña, Rafael; Pardillo-Mayora, José María

doi:10.1061/(asce)te.1943-5436.0000180

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…To explore the effect of sun glare on road safety, it is important to understand how sun glare can be modeled. According to previous literature, the occurrence of sun glare can be determined by four main factors, which are sun’s position, glare angle, terrain configuration, and weather ( 8 , 15 ). To address the two most critical factors which are sun’s position and glare angle ( 10 ), it is commonly accepted that the vertical and horizontal roadway geometries should point directly into the sun ( 8 ).…”

Section: Sun Glare Occurrence Analysismentioning

confidence: 99%

“…The geometrical conditions can be illustrated as shown in Figure 1. As for the angle limit, a sun angle of 20° was acknowledged to cause glare in most studies ( 1 , 2 , 8 , 15 ). This is also consistent with the findings from Zwaheln ( 16 ), which suggested the maximum angular distance for one’s visibility to be normally 20°.…”

Section: Sun Glare Occurrence Analysismentioning

confidence: 99%

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Sun Glare: Network Characterization and Safety Effects

Sun

El-Basyouny

Kwon

2018

Transportation Research Record: Journal of the Transportation R

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This research conducted a two-stage assessment to investigate sun glare effects on road safety in Edmonton. The first stage developed a methodology to model sun glare occurrence, aiming to identify when and where drivers are most likely to be exposed to sun glare. Safety risks at those identified locations during sun glare periods were assessed in the second stage. By contrasting the collisions during glare and non-glare conditions, this second stage aimed to quantify the effects of sun glare on road collisions. Consequently, three major findings were concluded. First, sun glare was found to significantly contribute to collision occurrence, especially at road intersections. Second, the effects of sun glare on collision occurrence during mornings on the eastbound and evenings on the westbound were observed to be particularly worse in the spring and fall months. In fact, safety in the southbound direction was significantly affected by sun glare during most daytime hours in the main winter months (November, December, and January). Lastly, the analysis revealed that certain collision types were more likely to occur during periods of sun glare. For example, collisions due to signal violations and failing to yield to pedestrians/cyclist were more likely to occur at intersections. At mid-block locations, the proportion of collisions occurring due to improper turning and lane changes were observed to be significantly higher. Overall, the approach proposed in this research provides a holistic method to quantify the effects of sun glare on road collisions and offers additional insights into the extent by which sun glare affects road safety.

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Section: Sun Glare Occurrence Analysismentioning

confidence: 99%

Section: Sun Glare Occurrence Analysismentioning

confidence: 99%

Sun Glare: Network Characterization and Safety Effects

Sun

El-Basyouny

Kwon

2018

Transportation Research Record: Journal of the Transportation R

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“…In the final plotting, the days and hours that the drivers would experience vision impairment on specified road segments during 1 year were detected. In a follow-up study, the authors also added the effect of shielding elements to the analysis of graphical identification of glare occurrence period ( 22 ). A new methodology was introduced by Churchill et al to measure continuous glare exposure across an entire road length throughout the year ( 2 ).…”

mentioning

confidence: 99%

Investigating the Probability of Potential Actions Performed by Drivers Experiencing Daytime Sun Glare-Induced Blindness

Koloushani

Kaya

Karaer

et al. 2023

Transportation Research Record: Journal of the Transportation R

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There has been extensive visual-disability-focused safety research resulting from various factors/conditions that have a significant impact on a driver’s ability to maneuver safely. One such critical condition among the major environmental issues that contribute to traffic crashes is daytime sun glare-induced temporary visual impairment. Nevertheless, the contribution of relevant factors to the choice of potential actions at the time of such crashes has not been widely studied. Approximately 3,000 crashes per year in the United States are attributed to sun glare, which may indicate that the driver had no control over the situation. Thus, this study investigated several factors to identify crashes that occurred, with acceptable certainty, under the direct influence of sun glare over 4 years (2014 to 2017) in Florida—“the Sunshine State.” A multinomial logistic regression model was developed to formulate relationships between crash-related contributing factors and to evaluate the likelihood of alternative actions being adopted by drivers experiencing sun glare. The results indicated that running red lights/stop signs was the most likely action one might take while experiencing this adverse condition, particularly on local roadways. A further consequence of sun glare is that drivers tend to follow the car in front too closely along segments with higher annual average daily traffic. The findings could help safety officials support the use of emerging intelligent transportation system technologies (i.e., automated traffic signal performance measures and cooperative intersection collision avoidance systems) to alert drivers of the possibility of a temporary vision impairment exactly when high-glare conditions exist.

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Study on the influence of sun glare on driving safety

Guo

Wang

et al. 2023

Building and Environment

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Methodology to Analyze Sun Glare Impact on Highway under Prolonged Exposure

Cited by 7 publications

References 7 publications

Sun Glare: Network Characterization and Safety Effects

Sun Glare: Network Characterization and Safety Effects

Investigating the Probability of Potential Actions Performed by Drivers Experiencing Daytime Sun Glare-Induced Blindness

Study on the influence of sun glare on driving safety

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