Nighttime Visibility in Varying Moonlight Conditions

Neale, William; Marr, James C.; Mckelvey, Nathan; Kuzel, Michael

doi:10.4271/2019-01-1005

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…The conclusion drawn was that equation (4) closely aligns with the empirical data, especially in capturing the asymmetrical angular behavior characterized by a weaker concentration of power on the left side of the headlight. This finding is consistent with the observations shared by other authors, such as 91–96 whose models also yielded similar results.…”

Section: Headlight Intensity Distribution Patterns Of the High And Lo...supporting

confidence: 93%

“…Similarly, the headlight radiation pattern curves of the high and low beams of the headlight luminous intensities at the 75th percentiles were presented by authors in 91,93–96 using ISO-candela, and ISO-illuminance as shown in Figures 7 and 8 respectively.…”

Section: Headlight Intensity Distribution Patterns Of the High And Lo...mentioning

confidence: 77%

“…Noteworthy contributors to this visual representation include authors such as. [91][92][93][94][95][96] Source: Neale et al 95 Similarly, the headlight radiation pattern curves of the high and low beams of the headlight luminous intensities at the 75th percentiles were presented by authors in 91,[93][94][95][96] using ISO-candela, and ISO-illuminance as shown in Figures 7 and 8 respectively.…”

Section: Headlight Intensity Distribution Patterns Of the High And Lo...mentioning

confidence: 99%

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A review of automotive intelligent and adaptive headlight beams intensity control approaches

Nkrumah,

Cai,

Jafaripournimchahi

2024

Advances in Mechanical Engineering

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The automotive headlight stands out as a critical vehicle component, particularly emphasized during nighttime driving. The high beam, designed for optimal driver visibility on long-distance roads, traditionally relies on manual control by the driver. However, this manual control poses challenges, particularly when the high beam light temporarily blinds oncoming drivers. The resultant dazzle for drivers of opposing vehicles is a significant concern. In response to these issues, there is a growing demand for adaptive and intelligent headlights that can autonomously adjust beam intensity. The intelligent headlight system takes on the responsibility of modifying the beam intensities without requiring explicit input from the drivers. This study aims to systematically review various approaches to controlling intelligent headlight beam intensity. The paper identifies four prominent approaches to intelligent headlight beam intensity control, recognized as widely used techniques. Furthermore, the study uncovers intriguing connections between some of these intensity control approaches. A survey on utilization rates indicates that sensor-based and machine learning (ML)-based intensity control approaches are the most commonly employed methods by automotive headlight designers. The paper concludes by providing insights into the future prospects of intelligent headlight technology, offering guidance for future researchers in this field.

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Section: Headlight Intensity Distribution Patterns Of the High And Lo...supporting

confidence: 93%

Section: Headlight Intensity Distribution Patterns Of the High And Lo...mentioning

confidence: 77%

Section: Headlight Intensity Distribution Patterns Of the High And Lo...mentioning

confidence: 99%

See 1 more Smart Citation

A review of automotive intelligent and adaptive headlight beams intensity control approaches

Nkrumah,

Cai,

Jafaripournimchahi

2024

Advances in Mechanical Engineering

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“…The subject of nighttime visibility of various means of transport has been discussed in a wide array of scientific publications [ 10 , 11 , 12 , 13 , 14 ]. For instance, Neale et al described the impact of the moon and its brightness on the illumination of pedestrians on roads [ 10 ]. The authors examined the intensity of pedestrian illumination with respect to the position of the moon in its individual phases.…”

Section: Literature Reviewmentioning

confidence: 99%

Research Regarding Different Types of Headlights on Selected Passenger Vehicles when Using Sensor-Related Equipment

Vrábel

Stopka

Paľo

et al. 2023

Sensors

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Statistical surveys show that the majority of traffic accidents occur due to low visibility, highlighting the need to delve into innovative car lighting technologies. A car driver must not only be able to see but also to be seen. The issue of headlight illumination is vital, especially during the dark hours of the night. Therefore, the focus of this article is determining the range of visibility of dipped (low-beam) headlights under specific experimental conditions. We also designed a methodical guideline aimed at identifying the distance at which dipped headlights illuminate the road while a vehicle is in motion. Research conducted on various classes of road confirmed that the Hyundai i40 is best used on higher-class roads, while the Dacia Sandero is better used on lower-class roads due to the shape and spreading out of its light cone. Furthermore, the pros and cons of the distribution of light cones on several classes of road are presented. Sensor-related equipment was also used to investigate light beam afterglow. In particular, an LX-1108 light meter was applied to determine the obstacle illumination intensity, the properties of which enable recording of low lighting values, and a DJI Mavic AIR 2 unmanned aerial vehicle (UAV; drone) was utilized to record the data related to the location of the examined vehicle, as well as light afterglow at night; relevant data evaluation was carried out using Inkscape software.

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“…Thus, a driver’s ability to detect hazards is generally limited by the illumination distance of their headlights. Drivers require approximately 1 - 2 lux of light to recognize a bright object, 3.2 - 5 lux to recognize a grayish object, and as much as 15 - 20 lux to recognize dark objects (e.g., Muttart et al, 2013; Neale et al, 2019). Muttart et al (2013) observed that, for vehicles that were less than five years old at the time of testing, low-beam headlights provided 3.2 lux of light for an average of approximately 250 feet, whereas highbeam bulbs provided 3.2 lux of light for over 350 feet.…”

Section: Vehicle Headlightsmentioning

confidence: 99%

Understanding overdriving: Human factors considerations in heavy vehicle headlight visibility and stopping distance

Davis,

Denga,

Shlanta

et al. 2023

Proceedings of the Human Factors and Ergonomics Society Annual

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Nighttime road fatalities are a significant safety concern in the U.S., especially those involving commercial vehicles. Often an explanation offered involves overdriving headlights, or driving at a speed that does not allow for safe response within the range of the headlights’ visibility. The scientific literature was reviewed to assess the real-world applicability of guidance commonly provided in Commercial Driver’s License (CDL) manuals that advises heavy vehicle drivers to drive at a speed that allows them to be able to stop within the range of the vehicle’s headlights. We conclude that this guidance provided by CDL does not account for the variety of roadway types, driver expectations, and travel speeds, nor a scientific understanding about visual perception and hazard avoidance. It is recommended that further work be conducted to examine real-world application of commercial vehicle driver capabilities and variable roadway types to better inform guidance and recommendations.

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Nighttime Visibility in Varying Moonlight Conditions

Cited by 6 publications

References 16 publications

A review of automotive intelligent and adaptive headlight beams intensity control approaches

A review of automotive intelligent and adaptive headlight beams intensity control approaches

Research Regarding Different Types of Headlights on Selected Passenger Vehicles when Using Sensor-Related Equipment

Understanding overdriving: Human factors considerations in heavy vehicle headlight visibility and stopping distance

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