Mehri Ahmad, Farhang Dehghan Somayeh, Hajizadeh Roohalah, Zakerian Seyed Abolfazl, Mohammadi Hamzeh, Abbasi Milad
a Department of Occupational Health , School of Public Health, Ilam University of Medical Sciences , Ilam , Iran.
b Department of Occupational Health , School of Public Health, Shahid Beheshti University of Medical Sciences , Tehran , Iran.
Traffic Inj Prev. 2017 Oct 3;18(7):711-715. doi: 10.1080/15389588.2017.1310379. Epub 2017 Apr 12.
On 2-lane roads, discomfort glare can cause annoyance, discomfort, inconvenience, stress, and fatigue to drivers, posing a risk of accidents. The aim of this study is to evaluate discomfort glare from the headlamps of cars widely used in Iran.
The discomfort glare of new vehicles including Pride Saba model GTX, Pride Model 131SL, Samand Soren, Peugeot 405, Megane, and Peugeot Pars was examined at distances of 5 to 100 m at a background luminance of 50 cd/m (late twilight/early dawn lighting) and 1 cd/m (nighttime) using Schmidt-Clausen and Bindels model and de Boer's subjective scale.
According to the de Boer scale, at a background luminance of 50 cd/m, the discomfort glare for all studied vehicles was between 1.98 and 4.05 in high-beam mode and between 3.5 and 5.4 in low-beam mode. At a background luminance of 1 cd/m, discomfort glare was between 0.41 and 2.48 in high-beam mode and between 1.93 and 3.84 in low-beam mode. In high-beam mode, the average levels of discomfort glare of these vehicles gradually increased when the distance between cars was reduced by up to about 20 m. In low-beam mode, there was no discomfort glare up to a vehicle distance of 40 m. In addition, at an angle of 1.15°-5.73° between the line of sight and light of vehicles in high-beam mode, the level of discomfort glare was increased, but at an angle of 5.73°-22.9° the level of discomfort glare was reduced. In low-beam mode at an angle of 2.86°-22.9°, the level of discomfort glare was almost identical. The results show that in high-beam mode and with a 100-m distance between vehicles as well as in low-beam mode at intervals of less than 40 m between cars, discomfort glare is created.
It can be concluded that by providing solutions such as installing road lighting system, an increase in luminance of roads, separating or widening road lanes, increasing the lateral distance between vehicles, and increasing the angle between lighted vehicles and drivers can noticeably reduce discomfort glare.
在双车道道路上，不舒适眩光会给驾驶员带来烦恼、不适、不便、压力和疲劳，从而构成事故风险。本研究的目的是评估伊朗广泛使用的汽车前照灯产生的不舒适眩光。
使用施密特 - 克劳森和宾德尔斯模型以及德布尔主观量表，在背景亮度为50 cd/m²（黄昏后期/黎明早期照明）和1 cd/m²（夜间）的条件下，对包括自豪萨巴GTX车型、自豪131SL车型、萨曼德索伦、标致405、梅甘娜和标致帕尔斯在内的新车，在5至100米的距离上进行不舒适眩光检测。
根据德布尔量表，在背景亮度为50 cd/m²时，所有研究车辆在远光模式下的不舒适眩光在1.98至4.05之间，近光模式下在3.5至5.4之间。在背景亮度为1 cd/m²时，远光模式下的不舒适眩光在0.41至2.48之间，近光模式下在1.93至3.84之间。在远光模式下，当两车之间的距离减少到约20米时，这些车辆的不舒适眩光平均水平逐渐增加。在近光模式下，车辆间距达40米时都没有不舒适眩光。此外，在远光模式下，当视线与车辆灯光之间的夹角为1.15° - 5.73°时，不舒适眩光水平增加，但夹角为5.73° - 22.9°时，不舒适眩光水平降低。在近光模式下，夹角为2.86° - 22.9°时，不舒适眩光水平几乎相同。结果表明，在远光模式下且车辆间距为100米时，以及在近光模式下车辆间距小于40米时，会产生不舒适眩光。
可以得出结论，通过提供诸如安装道路照明系统、提高道路亮度、分隔或拓宽车道、增加车辆横向间距以及增加被照明车辆与驾驶员之间的夹角等解决方案，可以显著减少不舒适眩光。
