Safety Evaluation of Sequential Warning Lights in Tapers at Nighttime Work Zones

2012 ◽  
Vol 2272 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Carlos Sun ◽  
Praveen Edara ◽  
Yi Hou ◽  
Andrew Robertson
Keyword(s):  
Safety Evaluation ◽  
Work Zones ◽  
Warning Lights

Risk Analysis Techniques for Safety Evaluation of Highway Work Zones

2000 ◽  
Vol 1715 (1) ◽  
pp. 10-17 ◽  
Author(s):  
Ana Maria Elias ◽  
Zohar J. Herbsman
Keyword(s):  
Risk Analysis ◽  
Safety Evaluation ◽  
Highway Safety ◽  
Point Of View ◽  
Work Zone ◽  
Work Zones ◽  
Construction Sites ◽  
Work Zone Safety ◽  
Accident Data ◽  
Temporary Closure

Construction sites or work zones create serious disruptions in the normal flow of traffic, resulting in major inconveniences for the traveling public. Furthermore, these work zones create safety hazards that require special consideration. Current legislation and programs, at both state and national levels, emphasize the need for a better understanding of work zone problems to address work zone safety. This reality—coupled with the temporary closure of more miles of highway every year for rehabilitation and maintenance—makes the analysis of safety at construction sites a serious matter. A summary of a comprehensive study associated with the development of a new practical approach to address highway safety in construction zones is presented. Because empirical models require sample sizes that are not attainable due to the intrinsic scarcity of construction zone accident data, the problem was studied from the point of view of risk analysis. Monte Carlo simulations were used to develop risk factors. These factors are meant to be included in the calculations of additional user costs for work zones, or simply applied as risk measurements, to optimize the length and duration of closures for highway reconstruction and rehabilitation projects. In this way, it will be possible to assess the danger of work zones to the traveling public and minimize adverse effect of work zones on highway safety.

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.

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

Traffic Safety Evaluation of Nighttime and Daytime Work Zones

2008 ◽  
Author(s):  
Melisa D. Finley ◽  
Gerald L. Ullman ◽  
James E. Bryden ◽  
Raghavan Srinivasan ◽  
Forrest M. Council ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Safety Evaluation ◽  
Work Zones

Photometric Evaluation of Steady-Burn Warning Lights in Work Zones

2014 ◽  
Vol 2458 (1) ◽  
pp. 88-95
Author(s):  
LuAnn Theiss ◽  
Jeffrey D. Miles ◽  
Gerald L. Ullman ◽  
Stefanie D. Maxwell
Keyword(s):  
Work Zones ◽  
Warning Lights

Evaluation of Cost-Effectiveness of Steady-Burn Warning Lights in Work Zones

2014 ◽  
Vol 2458 (1) ◽  
pp. 65-73 ◽  
Author(s):  
LuAnn Theiss ◽  
Michael P. Pratt ◽  
Gerald L. Ullman ◽  
Stefanie D. Maxwell
Keyword(s):  
Cost Effectiveness ◽  
Work Zones ◽  
Warning Lights

scholarly journals Toward the development of standards for yellow flashing lights used in work zones

2016 ◽  
Vol 50 (4) ◽  
pp. 552-570 ◽  
Author(s):  
MS Rea ◽  
JD Bullough ◽  
LC Radetsky ◽  
NP Skinner ◽  
A Bierman
Keyword(s):  
Field Study ◽  
Work Zone ◽  
Luminous Intensity ◽  
Work Zones ◽  
Driver Safety ◽  
Visual Discomfort ◽  
Directional Information ◽  
Warning Light ◽  
Warning Lights ◽  
Current Standards

Flashing yellow warning lights are important for worker and driver safety in work zones. Current standards for these lights do not address whether and how they should be coordinated to provide directional information to drivers navigating through work zones. A field study was conducted to assess driver responses to warning lights. The luminous intensities and flash patterns of warning lights along a simulated work zone were varied during daytime and nighttime. During the daytime, driver responses were relatively insensitive to warning light characteristics, although drivers preferred sequential and synchronised flash patterns over random, uncoordinated flashing. At nighttime, the combination of a temporal peak luminous intensity of 25 cd and a sequential flash pattern was optimal for providing directional information. A single initial warning light having a higher luminous intensity may help drivers detect the work zone without creating unacceptable visual discomfort.

Safety evaluation of weightlifting apparatus

2004 ◽  
Author(s):  
R. Beyer ◽  
T. J. Ayres ◽  
J. A. Mandell ◽  
J. Giffard ◽  
M. Larkin
Keyword(s):  
Safety Evaluation

The Effect of In-Vehicle Warning Systems on Speed Compliance in Work Zones

2010 ◽  
Author(s):  
James Whitmire ◽  
J. F. Morgan ◽  
Tal Oron-Gilad ◽  
P. A. Hancock
Keyword(s):  
Warning Systems ◽  
Work Zones
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