Yellow Lights?

2020 ◽  
Vol 85 (6) ◽  
pp. e19
Author(s):  
Geoffrey G. Hallock
Keyword(s):  
Yellow Lights

EXAMINATION OF PSYCHOLOGICAL EFFECTS AND THE ADDITIVITY ASSUMPTION IN THE STRESS EVALUATION OF CHROMATIC LED LIGHTINGS

2021 ◽  
Author(s):  
Y. Miura ◽  
Y. Oe ◽  
N. Yoshizawa
Keyword(s):  
Experimental Data ◽  
Psychological Stress ◽  
Psychological Effects ◽  
Stress Evaluation ◽  
Main Effect ◽  
The Future ◽  
Yellow Lights ◽  
Effect Of Light

The purpose of this study is to clarify the physiological and psychological effects of chromatic lighting through the subjective experiments. In this paper, we first compared the psychological effects of various illuminance and chromatic lights and confirmed the main effect of light colour on psychological stress. In the monochromatic lights, the green lights were stressless and the red lights were stressful. Among the mixed lights made of two kinds of monochromatic lights, the yellow lights tended to be stressless. We also examined the additivity of psychological stress from the viewpoint of irradiance. The result shows that the additivity could be assumed among blue, red, and their mixed light magenta at the conditions of 53 lx in front of the eyes, however, the additivity of other mixed colour lights needs to be investigated in the future with more experimental data.

Putative Perception of Rotating Permanent Magnetic Fields following Ingestion of LSD

1998 ◽  
Vol 87 (2) ◽  
pp. 601-602 ◽  
Author(s):  
M. A. Persinger
Keyword(s):  
Magnetic Fields ◽  
Field Strength ◽  
Lysergic Acid ◽  
Lysergic Acid Diethylamide ◽  
Complete Darkness ◽  
Greenish Yellow ◽  
Yellow Lights

While sitting alone in complete darkness, 3 participants who had ingested psychotropic concentrations of lysergic acid diethylamide reported diffuse blobs of white, purplish, or greenish-yellow lights as two horseshoe magnets rotated at 0.5 Hz. The experiences were not reported when the magnets were stationary or removed from the apparatus. The estimated peak-to-peak variation in field strength at the distance of perception was between 50 and 500 nanoTesla. An association between these results and possible ergot-induced perceptions of “magnet light” reported during the last century by von Reichenbach (1851) is suggested.

Efficacité du pré-signalement d'arrêt scolaire avec feux jaunes et avec feux de détresse

2002 ◽  
Vol 29 (3) ◽  
pp. 475-483
Author(s):  
Jean-François Bruneau ◽  
Denis Morin ◽  
Marcel Pouliot
Keyword(s):  
Relative Risk ◽  
Risk Ratio ◽  
Relative Effectiveness ◽  
Video Camera ◽  
Efficiency Index ◽  
Relative Risk Ratio ◽  
School Bus ◽  
School Buses ◽  
Light System ◽  
Yellow Lights

The pre-stop warning is activated by the bus drivers to warn motorists that the school bus will soon stop, requiring all vehicles to stop. On buses equipped with an eight-light system, four yellow flashing lights, located near the roof, precede the four red flashing lights activated with the stop-arm. In Québec, where pre-stop warning is not required, it is permitted to use the "hazard lights" as a pre-stop signal, when the school bus has red lights only. This study rates the relative effectiveness of the two systems, in fall and spring time. Advance signal lights are tested on the same routes : two- and four-lane rural or near urban highways, with high posted speeds (70 km/h and over). A video camera is aimed at oncoming traffic along with a radar antenna. Changes in drivers' speeds are studied with a relative risk ratio and an efficiency index, validated through expected frequencies. The eight-light system reduced significantly the rate of illegal passing and the overall speed during advance signal. The eight-light system was more effective than the hazard lights for all tested parameters, including visibility, traffic, weather, and season. The near-roof position of the yellow lights probably explains the gap between the two systems.Key words: advance signalling device, pre-stop warning, eight-light system, amber lights, hazard lights, school buses, illegal passing, speed, relative risk ratio, road safety, rural area.

scholarly journals Yellow Light Decision Based On Driving Style: Day Or Night？

2021 ◽  
Author(s):  
Xuan Wang ◽  
Yan Mao ◽  
Jing Jing Xiong ◽  
Wu He
Keyword(s):  
Driving Simulator ◽  
Yellow Light ◽  
Driving Style ◽  
Lighting Conditions ◽  
Yellow Lights ◽  
Important Basis

Abstract Drivers' driving decisions at yellow lights are an important cause of accidents at intersections. According to previous studies driving style is an important basis for deciding whether a driver passes a yellow light or not. This study therefore aims to investigate the effect of different driving styles on driving decisions at yellow lights under different lighting conditions. In this paper, 64 licensed drivers were recruited to study the effect of different driving styles on the decision to drive through yellow lights under both daytime and nighttime lighting conditions using a driving simulator and a VR device. The results showed that maladjusted drivers were faster and more likely to pass the yellow light than adapted drivers (81.25% > 43.75%) in both day and night. Male drivers had higher overall driving style scores than female drivers, and male drivers were faster and more likely to pass a yellow light than female drivers (56.25% > 31.25%). The study also found that inexperienced drivers were faster and more likely to pass a yellow light than experienced drivers (50% > 37.5%). Overall, maladjusted drivers are more likely to pass yellow lights, and we can improve this situation by enhancing driving learning for maladjusted drivers.

Yellow lights for emerging technologies

Science ◽  
2015 ◽  
Vol 349 (6246) ◽  
pp. 384-385 ◽  
Author(s):  
R. A. Charo
Keyword(s):  
Emerging Technologies ◽  
Yellow Lights

scholarly journals Effects of Lighting and Background with Common Signal Lights on Human Peripheral Color Vision

1970 ◽  
Vol 12 (4) ◽  
pp. 401-407 ◽  
Author(s):  
Richard A. Dudek ◽  
George M. Colton
Keyword(s):  
Color Vision ◽  
Peripheral Vision ◽  
Testing Procedures ◽  
False Color ◽  
Environmental Light ◽  
Test Position ◽  
Color Identification ◽  
Yellow Lights ◽  
Common Signal ◽  
Male Subjects

The research reported investigated two aspects of binocular peripheral color vision important to an industrial situation, viz., relative color fields of red, yellow, green, and blue test lights; and false color identification under independent variables of color of background, environmental light, and test position. Four male subjects with a similar peripheral vision field (within ± 2° of one another) were selected for the study. In general, blue and yellow lights used on a gray background with a low level of environmental light gives the best results for the greatest recognition distance of color and the least number of errors made. Subjects displayed large variation, indicating justification for an industrial firm to institute testing procedures to obtain workers that meet specific peripheral color vision requirements.

Assessing Drivers’ Compliance with Restrictive Yellow Traffic Lights in a Developing Country

2020 ◽  
pp. 036119812097365
Author(s):  
Abdoul-Ahad Choupani
Keyword(s):  
Developing Country ◽  
Red Light ◽  
Yellow Light ◽  
Red Light Running ◽  
Traffic Lights ◽  
Light Passing ◽  
Yellow Lights ◽  
Behavioral Issue ◽  
Stop Line ◽  
Restrictive Policy

Driving rules adopt permissive or restrictive policies concerning yellow light running (YLR). In a restrictive policy, vehicles behind the stop line are not allowed to enter the intersection on yellow no matter how close they are to the stop line. YLR policy affects driving risks, safety, and operation. There is limited knowledge about the restrictive policy and drivers’ compliance with this rule. Previous studies on YLR are limited in scope since they tended to use binary stop/go decision models without considering red light running decisions. This potentially results in the loss of information about drivers’ conformity to red signals. This paper examines whether drivers are only non-compliant with yellow lights or whether non-conformity to any prohibitive yellow/red signal emerges as a wider behavioral issue. This study develops regression choice models to predict drivers’ illegal yellow-light passing decisions in a developing country with a poor safety record and explores reasons for drivers’ non-compliance. The results obtained show that the restrictive policy is ineffective in relation to driver compliance, especially in cases where drivers’ non-conformity to any restrictive rule emerges as a behavioral issue of concern. Drivers make their stop/go decisions according to the time needed to cross the intersection, and they consider the yellow light as an opportunity for crossing. Yellow (red) light running rates were 101 (31) per 1,000 vehicles per hour (vph) for the restrictive policy, whereas these rates for the U.S.A., with a permissive policy, were at most 29 (6) per 1,000 vph.

scholarly journals PERFORMANCE ANALYSIS OF UNSIGNALIZED INTERSECTION ON PERJUANGAN AND VETERAN STREET MARTAPURA BANJAR DISTRICT

CERUCUK ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 33
Author(s):  
Achmad Fajar ◽  
Yasruddin Yasruddin
Keyword(s):  
Secondary Data ◽  
Service Level ◽  
Degree Of Saturation ◽  
Primary Data ◽  
Residential Areas ◽  
The Road ◽  
Geometric Conditions ◽  
Yellow Lights ◽  
Forecasting Analysis ◽  
Intersection Management

The intersection of Jl. Perjuangan – Jl. Veteran is located in Martapura City, Banjar Regency, South Kalimantan Province. At this intersection there are only cautionary street lights or yellow lights, then the Intersection condition which is the road to residential areas, schools, shops, and traditional markets to support the occurrence of traffic jams and accidents            Primary data or data taken from the field include geometric conditions, environmental conditions, side barriers, traffic volume at the Intersection of Jalan Perjuangan - Jalan Veteran Martapura City. Secondary data includes the number of residents in Martapura City and data on the growth of the number of vehicles. Furthermore, the data samples were analyzed using the Indonesian Road Capacity Manual (MKJI, 1997) to find out whether Intersection performance is still feasible or not. If the results of the analysis show that the Intersection performance is no longer feasible, it is necessary to solve the problem.               At the intersection, Jl. Perjuangan - Jl. Veteran, Martapura City, Banjar Regency, on a unsignal condition, obtained a degree of saturation (DS) of 0.76 and delay (D) of all intersections of 12.7 seconds / smp with the Service Level Index at B, which indicates that at the intersection still has good conditions. After forecasting analysis, it is found that in the 6th year the degree of saturation (DS) is 1.11 and the whole delay is 26.21 seconds / smp with the Service Level Index in class D where the intersection has reached a bad condition or must be done intersection management analysis. By analyzing the form of intersection management when applied with a signalized intersection, the alternative 2 phase proposal is the best which is seen from the degree of saturation and delay with the value of Degree Saturation (DS) 0.74 and Delay (D) 18,33 seconds / smp with the intersection service level becomes C.

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