scholarly journals Can light emitting diode-based road studs improve vehicle control in curves at night? A driving simulator study

2016 ◽  
Vol 50 (2) ◽  
pp. 266-281 ◽  
Author(s):  
A Shahar ◽  
R Brémond ◽  
C Villa
Keyword(s):  
Driving Simulator ◽  
Light Emitting Diode ◽  
Lateral Position ◽  
Vehicle Control ◽  
Night Time ◽  
Light Emitting ◽  
Road Lighting ◽  
Country Road ◽  
Simulator Study ◽  
Subjective Level

Road delineation treatments enhance the ability of drivers to control their vehicle safely on winding roads. A simulator experiment compared night-time driving on a country road under three conditions: on an unlit road, on a road illuminated on curves by typical road luminaires, and on a road with an active lane delineation application, where self-luminous road studs are turned on to outline the lane and road edges as the driver approaches and passes the curves. The unlit condition induces greater lateral position variability and longer crossovers relative to the studs condition, demonstrating better lateral vehicle control in the latter. The luminaires condition induce greater lateral position variability in left curves, and longer crossovers in right curves, relative to the studs condition, which also demonstrates a better lateral vehicle control in the studs condition. At a subjective level, the participants perceived both the studs condition and the luminaires condition as safer, more comfortable and allowing better control than the unlit road. It was concluded that the tested application enhanced the ability of drivers to control the virtual car, as compared to an unlit road or road lighting.

scholarly journals Effect of Road Markings and Traffic Signs Presence on Young Driver Stress Level, Eye Movement and Behaviour in Night-Time Conditions: A Driving Simulator Study

Safety ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 24 ◽  
Author(s):  
Darko Babić ◽  
Dario Babić ◽  
Hrvoje Cajner ◽  
Ana Sruk ◽  
Mario Fiolić
Keyword(s):  
Eye Movement ◽  
Traffic Safety ◽  
Driving Simulator ◽  
Relevant Information ◽  
Lateral Position ◽  
Night Time ◽  
Traffic Signs ◽  
Young Drivers ◽  
Driving Speed ◽  
Dependent Samples

The study investigates how the presence of traffic signalling elements (road markings and traffic signs) affects the behaviour of young drivers in night-time conditions. Statistics show that young drivers (≤30 years old) are often involved in road accidents, especially those that occur in night-time conditions. Among other factors, this is due to lack of experience, overestimation of their ability or the desire to prove themselves. A driving simulator scenario was developed for the purpose of the research and 32 young drivers took two runs using it: (a) one containing no road markings and traffic signs and (b) one containing road markings and traffic signs. In addition to the driving simulator, eye tracking glasses were used to track eye movement and an electrocardiograph was used to monitor the heart rate and to determine the level of stress during the runs. The results show statistically significant differences (dependent samples t-test) between the two runs concerning driving speed, lateral position of the vehicle, and visual scanning of the environment. The results prove that road markings and traffic signs provide the drivers with timely and relevant information related to the upcoming situation, thus enabling them to adjust their driving accordingly. The results are valuable to road authorities and provide an explicit confirmation of the importance of traffic signalling for the behaviour of young drivers in night-time conditions, and thus for the overall traffic safety.

scholarly journals Analysis of Electric Power Quantities of Road LED Luminaires under Sinusoidal and Non-Sinusoidal Conditions

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1109
Author(s):  
Roman Sikora ◽  
Przemysław Markiewicz
Keyword(s):  
Supply Voltage ◽  
Light Emitting Diode ◽  
Luminous Flux ◽  
Laboratory Measurements ◽  
Electrical Parameters ◽  
Light Emitting ◽  
Road Lighting ◽  
Legal Provisions ◽  
Acceptable Range ◽  
Deformation Level

The paper presents the results of laboratory tests concerning the measurements of electrical parameters of road lighting luminaires. These measurements were focused on determining the dependence of the electrical parameters of the luminaires versus the changes of the RMS (Root Mean Square) value of the supply voltage and the level of disturbances in the supply voltage. The basic electrical parameters for light-emitting diode (LED) luminaires were analysed with the option of luminous flux adjustment if it existed. During the laboratory measurements, the luminaires were powered from the Agilent 6834B distorted voltage generator within the assumed acceptable range of the changes in the deformation level resulting from the applicable legal provisions for the reproduction of actual power supply conditions.

scholarly journals ADVANCED SAFETY SYSTEM FOR AUTOMOBILES THROUGH VEHICLE TO VEHICLE COMMUNICATION USING LIFI

2020 ◽  
Vol 6 (10) ◽  
pp. 31-36
Author(s):  
Sheik Shameem Mohamed Yousuff Raja ◽  
Nithiish Chellaiah ◽  
Goharnath Murali ◽  
Niresh J
Keyword(s):  
Light Emitting Diode ◽  
Control Unit ◽  
Vehicle Control ◽  
Safety System ◽  
Speed Limit ◽  
Light Emitting ◽  
Led Light ◽  
Human Eye ◽  
Vehicle Communication ◽  
Vehicle To Vehicle

The new vehicle execution has been persistently improved and the examination resultsidentifying with the wellbeing of vehicle driving have additionally been consistently announcedand illustrated, it is attempting to discover an equalization point between the advancement ofvehicle speed limit and the assurance of driver's security. Li-Fi is a VLC, visible lightcommunication innovation that manages move of information through enlightenment byremoving fibre from optics by sending information through a LED light that fluctuates in theforce quicker than a human eye can pursue. In this undertaking we attempt to build up aframework to give the before mishap data to the vehicle control unit with the goal that itempowers the vehicle to anticipate the occurrence of mishap. Vehicle to vehicle correspondenceis the best arrangement that has been utilized so as to decrease vehicles' mishaps. The proposedutilization of Li-Fi innovation in this task involves the light emitting diode (LED) bulbs asmethods for network by sending information through light range as an optical remote vehiclefor signal engendering. Truth be told, the use of LED dispenses with the need of complex remotesystems and conventions.

scholarly journals Multiple night-time light-emitting diode lighting strategies impact grassland invertebrate assemblages

2017 ◽  
Vol 23 (7) ◽  
pp. 2641-2648 ◽  
Author(s):  
Thomas W. Davies ◽  
Jonathan Bennie ◽  
Dave Cruse ◽  
Dan Blumgart ◽  
Richard Inger ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Night Time ◽  
Light Emitting ◽  
Invertebrate Assemblages

Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

2021 ◽  
pp. 036119812098657
Author(s):  
Adrian Sandt ◽  
Haitham Al-Deek
Keyword(s):  
Life Cycle ◽  
Capital Investment ◽  
Road Network ◽  
Light Emitting Diode ◽  
Night Time ◽  
Light Emitting ◽  
Limited Access ◽  
Toll Road ◽  
Improved Performance ◽  
Benefit Cost

Limited access facility wrong-way driving (WWD) crashes are typically more severe than other crashes. Deploying advanced WWD countermeasures, such as rectangular flashing beacon (RFB) and light-emitting diode (LED) technologies, at exit ramps can reduce WWD crashes, injuries, and fatalities. No previous research has developed a methodology to quantify the potential fatality and injury savings because of future countermeasure deployments. This paper developed such a methodology and applied it to Florida’s Turnpike Enterprise (FTE) toll road network. From 2011–2016, there were 53 FTE WWD crashes, resulting in 16 fatalities and annual injury costs of $37 million. The proportion of these crashes occurring during night-time was 87%. RFB and LED life-cycle injury savings and costs were determined for all 216 FTE exits. The total savings were $424 million for RFBs (benefit–cost [B/C] ratio of 23.20) and $144 million for LEDs (B/C ratio of 13.13). Deploying countermeasures at the 103 exits with the highest B/C ratios would provide 70% of the total possible savings by equipping 40% of the ramps. For the same capital investment, RFBs provide more savings than LEDs. Spending $1 million to deploy RFBs will provide similar savings as spending $3.4 million to deploy LEDs. Evaluating the existing FTE RFB and LED ramps shows that RFBs are more effective at night-time and can provide three times the savings of LEDs. The results of this paper show the improved performance of RFBs over LEDs and provide an example that other agencies could follow to identify savings and cost-effectively deploy advanced WWD countermeasures.

scholarly journals The effect of different delineator post configurations on driver speed in night-time traffic: A driving simulator study

2014 ◽  
Vol 72 ◽  
pp. 341-350 ◽  
Author(s):  
Sara Nygårdhs ◽  
Sven-Olof Lundkvist ◽  
Jan Andersson ◽  
Nils Dahlbäck
Keyword(s):  
Driving Simulator ◽  
Night Time ◽  
Simulator Study

scholarly journals First Estimation of Global Trends in Nocturnal Power Emissions Reveals Acceleration of Light Pollution

2021 ◽  
Vol 13 (16) ◽  
pp. 3311
Author(s):  
Alejandro Sánchez de Miguel ◽  
Jonathan Bennie ◽  
Emma Rosenfeld ◽  
Simon Dzurjak ◽  
Kevin J. Gaston
Keyword(s):  
Light Emitting Diode ◽  
Visible Spectrum ◽  
Light Pollution ◽  
Limited Evidence ◽  
Night Time ◽  
Global Trends ◽  
Light Emitting ◽  
Global Spread ◽  
Satellite Sensors ◽  
Visible Wavelengths

The global spread of artificial light is eroding the natural night-time environment. The estimation of the pattern and rate of growth of light pollution on multi-decadal scales has nonetheless proven challenging. Here we show that the power of global satellite observable light emissions increased from 1992 to 2017 by at least 49%. We estimate the hidden impact of the transition to solid-state light-emitting diode (LED) technology, which increases emissions at visible wavelengths undetectable to existing satellite sensors, suggesting that the true increase in radiance in the visible spectrum may be as high as globally 270% and 400% on specific regions. These dynamics vary by region, but there is limited evidence that advances in lighting technology have led to decreased emissions.

Sign in / Sign up

Export Citation Format

Share Document