Impact of Adaptive Front-lighting Systems (AFS) on road safety: Evidences and open points

Peña-García, Antonio; Peña, Paula Olivencia; Espín, Antonio M.; Aznar, F.

doi:10.1016/j.ssci.2011.10.013

Cited by 17 publications

(8 citation statements)

References 17 publications

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“…These parameters include ambient or vehicle lights [23,24], as well as weather conditions. It needs to be pointed out that there is a feedback between vehicle lights and street or road lighting, which results in complex interactions between them [25][26][27].…”

Section: Discussionmentioning

confidence: 99%

Empirical Study of How Traffic Intensity Detector Parameters Influence Dynamic Street Lighting Energy Consumption: A Case Study in Krakow, Poland

Wojnicki

Kotulski

2018

Sustainability

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Abstract:The deployment of dynamic street lighting, which adjusts lighting levels to fulfill particular needs, leads to energy savings. These savings contribute to the overall lighting infrastructure maintenance cost. Yet another contribution is the cost of traffic intensity data. The data is read directly from sensor systems or intelligent transportation systems (ITSs). The more frequent the readings are, the more costly they become, because of hardware capabilities, data transfer and software license costs, among others. The paper investigates a relationship between the frequency of readings, in particular the averaging window size and step, and achieved energy savings. It is based on a simulation, taking into account a representative part of a city and traffic intensity data, which span over a period of one year. While the energy consumption reduction is simulated, all data, including each luminaire power setting, induction loop locations and street characteristics, come from a representative sample of the city of Krakow, Poland. Controlling the power settings complies with the lighting standard CEN/TR 13201. Analysis of the outcomes indicates that the shorter the window size or step are, the more energy saving that is available. In particular, for the previous standard CEN/TR 13201 2004, having the window size and step at 15 min results in 26.75% of energy saving, while reducing these values to 6 min provides 27%. Savings are more profound for the current standard (CEN/TR 13201 2014), assuming a 15 min size and step results in 47.43%, while having a 6 min size and step provides 47.69%. The results can serve as a guideline for identifying the economic viability of dynamic lighting control systems. Additionally, it can be observed that the current lighting standard provides far greater potential for dynamic control then the previous standard.

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Section: Discussionmentioning

confidence: 99%

Empirical Study of How Traffic Intensity Detector Parameters Influence Dynamic Street Lighting Energy Consumption: A Case Study in Krakow, Poland

Wojnicki

Kotulski

2018

Sustainability

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“…2. In addition, more beams patterns with adaptation to various conditions, called an adaptive front-lighting system (AFS) [27], are defined in Regulations ECE 123 and 48. Most of the optical regulations for the LED headlamp are derived from the traditional headlamps.…”

Section: Fundamentals Of the Led Headlampmentioning

confidence: 99%

“…AFS system [27,69], where the headlight intensity is controlled based on the speed, distance between the vehicle and other vehicles, weather condition and type of the road, is a typical application using the human factors. Another example is that the LED headlamp with correlated color temperature (CCT) of 5000 K is suggested to be more comfortable for the driver because the CCT is near to that of the daylight [84].…”

Section: Trends Of the Led Headlampmentioning

confidence: 99%

A review on light-emitting diode based automotive headlamps

Long

Zhou

et al. 2015

Renewable and Sustainable Energy Reviews

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“…Many types of research have been carried out to reduce glare but the processes are not cost-effective to include in all vehicles. A study on the impact of adaptive frontal lighting system considering the road safety to analyze some unseen values like potential impact in safety and accident prevention that arises along with the Economic Commission for Europe (ECE) regulatory framework [1]. The development in making a headlight glare simulator used for driving simulations by using LED splitters in headlights made to superimpose on a driving simulator to get two approaching vehicles as in real-time.…”

Section: Introductionmentioning

confidence: 99%

A Retrofit for Controlling the Brightness of an Automotive Headlight to Reduce Glare by using Embedded C Program on a PIC Microcontroller

S*¹,

Prasanna²,

S³

et al. 2019

IJRTE

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 Abstract: In an automotive, the headlights are the most needed equipment to help the drivers to get a proper viewing at night. Major difficulties of visibility while driving at night will be either due to bad weather conditions or due to approaching vehicles high beam striking on the driver. High beams create a problem called glare which makes the driver have partial blindness for a small-time period. The solution for this glaring effect is to either deviate the incident high beam light of the vehicles or to reduce the brightness of the light so that the glare caused can be reduced. This work is an experiment to show how the glare can be reduced by reducing the brightness of the high beam light, by taking inputs of the vehicle speed and proportionally altering the voltage supplied to the head-lamps. With embedded C program language, an experimental setup was made where the voltage supply to the bulb is controlled according to the program. This results in reducing the luminous of the light source. This methodology can be adapted to the existing vehicles

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Impact of Adaptive Front-lighting Systems (AFS) on road safety: Evidences and open points

Cited by 17 publications

References 17 publications

Empirical Study of How Traffic Intensity Detector Parameters Influence Dynamic Street Lighting Energy Consumption: A Case Study in Krakow, Poland

Empirical Study of How Traffic Intensity Detector Parameters Influence Dynamic Street Lighting Energy Consumption: A Case Study in Krakow, Poland

A review on light-emitting diode based automotive headlamps

A Retrofit for Controlling the Brightness of an Automotive Headlight to Reduce Glare by using Embedded C Program on a PIC Microcontroller

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