Modifications to the CIE 115-2010 procedure for selecting lighting classes for roads

Strbac-Hadzibegovic, N; Kostic, M

doi:10.1177/1477153514564174

Cited by 4 publications

(2 citation statements)

References 5 publications

(10 reference statements)

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“…A longitudinal uniformity along the center of each lane is recommended for tunnels with a threshold of 0.6. The values of 0.4 and 0.6 are comparable to the average illumination values stipulated by the regulations CIE 115-1995 [20,22].…”

Section: Optical Design Of Led Cbl For Cie Tunnel Road Lightingsupporting

confidence: 70%

“…The lens uses the internal reflection and refraction of light to work, which is different from traditional optical LED devices, such as optical reflectors or total internal reflection (TIR) devices [9,18]. Through optical simulation experiments in a trial tunnel in Taiwan, the LED light was demonstrated to be suitable for use as a Counter Beam Light (CBL) and able to meet the CIE 88:2004 regulations for tunnel lighting with appropriate light arrangements [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Liao¹,

Chen²,

et al. 2021

Energies

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An LED Counter Beam Light (CBL) with a free surface secondary lens is proposed to enhance the safety and efficiency of tunnels. The secondary lens was designed and produced to be mounted on a 50 W white-light LED array to generate the targeted counter beam pattern, in order to meet the standards for enhanced tunnel road lighting of the CIE (Commission Internationale de l’Eclairage)—CIE 88:2004—in a trial tunnel lighting scheme. Through the simulation of a road tunnel in Northern Taiwan using the LiteStar four-dimensional software, it was shown that the proposed LED light can serve as a qualifying CBL to generate an average road tunnel surface luminance (Lav) of 182.76 cd/m2, which is better than the 138 cd/m2 that commercial High-Pressure Sodium (HPS) tunnel lights can provide and the 181 cd/m2 minimum stipulated in the CIE 88:2004 regulations. The results also show that the proposed LED light accomplishes a contrast revealing coefficient qc of 1.03, which is above the minimum regulatory level of 0.6 for a qualified CBL, as well as a luminance uniformity Uo of 0.89 (regulatory minimum, 0.4), longitudinal luminance uniformity UL of 0.99 (regulatory minimum, 0.6), and glare factor TI (threshold increment) of 7.24% (regulatory minimum, 15%). In order to test the feasibility of the LED CBL for future commercialization, the proposed LED CBL was prototyped and measured; the results demonstrate that an average road surface luminance (Lav) of 184.5 cd/m2, intensity of the luminance uniformity Uo of 0.7, intensity of the longitudinal luminance uniformity UL of 0.94, glare factor of 7.04%, and contrast revealing coefficient qc of 1.38 can be achieved, which are all above the levels required by the CIE 88:2004 regulations.

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Section: Optical Design Of Led Cbl For Cie Tunnel Road Lightingsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Liao¹,

Chen²,

et al. 2021

Energies

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Road Classification Based Energy Efficient Design and its Validation for Indian Roads

Chakraborty

Barua

Bhattacharjee

et al. 2018

L&E

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Road lighting consumes a significant portion of global electricity. A good road lighting design ensures the fulfilment of visual requirements with optimized design. The initial step for a good road lighting design is to identify the exact lighting class of the concerned road. The existing Indian Road lighting Standard IS: 1944, 1970 is not so well defined with respect to the modern Indian roads. It demands a specific model for classifying any Indian road. This paper focuses towards the validation of a proposed model, which is a modified mathematical model as recommended by CIE: 115, 2010 for classifying the exact lighting category of the Indian roads. This paper also highlights the scope of energy saving by changing the design according to the changed lighting class during different traffic hours in night. Some innovative design is also proposed for a new road based on the proposed classification methodology.

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Introduction of a New Lighting Class for Motorized Roads in Indian Scenario

Chakraborty

Ray

Mazumdar

2021

L&E

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The requirement of good lighting in road is an essential criterion. But the global energy crunch forces the optimization of energy consumption in road lighting design. The optimization of road lighting design starts with the determination of exact lighting class of the concerned road. The lighting class of different road depends upon few parameters related to traffic, road and its ambient condition. Most of the Indian roads are mixed and highly motorized in nature. In this paper, a new methodology for lighting classification of motorized Indian roads has been proposed. This proposed model has been developed based upon statistical analysis of traffic related parameters in Indian context. This model has also been validated in some real road context. Furthermore, this paper also demonstrates an approach for designing the lighting installation of a motorized road by maintaining the recommended lighting condition corresponds to the lighting class. This finally leads to an energy efficient design.

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Modifications to the CIE 115-2010 procedure for selecting lighting classes for roads

Cited by 4 publications

References 5 publications

Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Road Classification Based Energy Efficient Design and its Validation for Indian Roads

Introduction of a New Lighting Class for Motorized Roads in Indian Scenario

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