‘The warning lights are flashing.’ Report finds nations failing to protect biodiversity

Science ◽  
2020 ◽  
Author(s):  
Erik Stokstad
Keyword(s):  
Warning Lights

Effectiveness of Green Warning Lights with Different Flashing Patterns for Winter Maintenance Operations

2021 ◽  
pp. 036119812110081
Author(s):  
Fatemeh Fakhrmoosavi ◽  
Ramin Saedi ◽  
Farish Jazlan ◽  
Ali Zockaie ◽  
Mehrnaz Ghamami ◽  
...  
Keyword(s):  
Human Subjects ◽  
Test Results ◽  
Night Time ◽  
Winter Maintenance ◽  
Warning Light ◽  
Rigorous Study ◽  
Static Versus Dynamic ◽  
Color Combinations ◽  
Warning Lights ◽  
Pavement Friction

Snow removal activities are performed by roadway agencies to enhance winter mobility and safety. Slower travel speeds during these operations, combined with low visibility and reduced pavement friction, mean that safety and collision avoidance remain a persistent concern. Many studies have implemented signing and lighting technologies to improve the visibility of snowplows. Although a few studies have evaluated the use of different colors on snowplows, there is no rigorous study that evaluates the potential impacts of using green warning lights for winter maintenance operations. This study, therefore, investigates the impacts of various warning light configurations on the visibility of snowplows, with the focus on green lights. To this end, 37 warning light configurations are designed using various color combinations (green and amber), and flashing patterns (single and quad) on the back (LED), the top (beacon), or both, of snowplows. These configurations are evaluated to identify the most effective configurations. Three sets of experiments are designed and implemented: static, dynamic, and weather to evaluate the visibility effectiveness in different contexts: day versus night, clear versus snowy weather, and static versus dynamic scenarios. Human subjects are employed to conduct the experiments and the test results are evaluated using statistical analyses. The conspicuity during the day time and glare during the night time are statistically different among various configurations. In addition, adding green lights with a single flash pattern to amber warning lights improves the conspicuity, while keeping the glare at an acceptable level relative to configurations using only amber.

Warning Lights of Asia

1940 ◽  
Vol 96 (5) ◽  
pp. 360
Author(s):  
B. M. G. ◽  
Gerald Samson
Keyword(s):  
Warning Lights

Strange skies: Weird earthquake warning lights

2012 ◽  
Vol 213 (2853) ◽  
pp. 43
Author(s):  
Stephen Battersby
Keyword(s):  
Warning Lights

Driver Behavior in Response to Flashing Lights

2019 ◽  
Vol 2673 (5) ◽  
pp. 703-708 ◽  
Author(s):  
Kristin Kersavage ◽  
Nicholas P. Skinner ◽  
John D. Bullough ◽  
Philip M. Garvey ◽  
Eric T. Donnell ◽  
...  
Keyword(s):  
Driver Behavior ◽  
Sequential Pattern ◽  
Work Zone ◽  
Lane Change ◽  
Work Zones ◽  
The Road ◽  
The Individual ◽  
The Right ◽  
Warning Lights ◽  
Current Standards

Flashing yellow warning lights notify drivers about the presence of work along the road. Current standards for these lights address performance of the individual light but not how lights should function when multiple lights are used. In the present study, warning lights were used to delineate a lane change taper in a simulated work zone. Lights flashed with varying intensities and either randomly or in sequence, with lights flashing in turn along the length of the lane change taper, either to the right or to the left. In half of the trials, a flashing police light bar was used on a vehicle located within the simulated work zone. Participants were asked to drive a vehicle approaching the work zone and to identify, as quickly as possible, in which direction the taper’s lane change was (either to the right or left). Drivers were able to correctly identify the taper from farther away when the lights flashed in a sequential pattern than when the flash pattern was random; and the presence of a police light bar resulted in shorter identification distances. The results, along with previous research, can inform standards for the use of flashing lights and police lights in work zones for the safety of drivers and workers.

Is Use of Warning Lights and Sirens Associated With Increased Risk of Ambulance Crashes? A Contemporary Analysis Using National EMS Information System (NEMSIS) Data

2019 ◽  
Vol 74 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Brooke L. Watanabe ◽  
Gregory S. Patterson ◽  
James M. Kempema ◽  
Orlando Magallanes ◽  
Lawrence H. Brown
Keyword(s):  
Information System ◽  
Increased Risk ◽  
Warning Lights

Utilization of Warning Lights and Siren Based on Hospital Time-Critical Interventions

2010 ◽  
Vol 25 (4) ◽  
pp. 335-339 ◽  
Author(s):  
Andreia Marques-Baptista ◽  
Pamela Ohman-Strickland ◽  
Kimberly T. Baldino ◽  
Michael Prasto ◽  
Mark A. Merlin
Keyword(s):  
Life Support ◽  
Advanced Life Support ◽  
Time Of Day ◽  
Average Difference ◽  
Transport Time ◽  
Day Of The Week ◽  
Medical Transport ◽  
Critical Patients ◽  
Time Critical ◽  
Warning Lights

AbstractObjective:The objective of this study was to evaluate the time saved by usage of lights and siren (L&S) during emergency medical transport and measure the total number of time-critical hospital interventions gained by this time difference.Methods:A retrospective study was performed of all advanced life support (ALS) transports using lights and siren to this university emergency department during a three-week period. Consecutive times were measured for 112 transports and compared with measured transport times for a personal vehicle traveling the same day of the week and time of day without lights and siren. The time-critical hospital interventions are defined as procedures or treatments that could not be performed in the prehospital setting requiring a physician. The project assessed whether the patients received the hospital interventions within the average time saved using lights and siren transport.Results:The average difference in time with versus without L&S was -2.62 minutes (95% CI: -2.60− -2.63, paired t-test p <0.0001). The average transport time with L&S was 14.5 ±7.9 minutes (min) (1 standard deviation/minute (min), range = 1–36 min.). The average transport time without L&S was 17.1 ±8.3 min (range = 1−40 min). Of the 112 charts evaluated, five patients (4.5%) received time-critical hospital interventions. No patients received time-critical interventions within the time saved by utilizing lights and siren. Longer distances did not result in time saved with lights and siren.Conclusions:Limiting lights and siren use to the patients requiring hospital interventions will decrease the risks of injury and death, while adding the benefit of time saved in these critical patients.

Impact on Driver Behavior of Steady-Burn Warning Lights on Channelizing Drums in Work Zones

2011 ◽  
Vol 2258 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Timothy J. Gates ◽  
Peter T. Savolainen ◽  
Tapan K. Datta ◽  
Prasad Nannapaneni
Keyword(s):  
Driver Behavior ◽  
Work Zones ◽  
Warning Lights
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