Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview

2020 ◽  
Author(s):  
Paul Lutkevich ◽  
Ronald Gibbons ◽  
Rajaram Bhagavathula ◽  
Don McLean ◽  
◽  
...  
Keyword(s):  
Solid State ◽  
Lighting Design ◽  
Design Guide ◽  
Roadway Lighting

Solid-State Roadway Lighting Design Guide: Volume 1: Guidance

2020 ◽  
Author(s):  
Paul Lutkevich ◽  
Ronald Gibbons ◽  
Rajaram Bhagavathula ◽  
Don McLean ◽  
◽  
...  
Keyword(s):  
Solid State ◽  
Lighting Design ◽  
Design Guide ◽  
Roadway Lighting

Recommended Guidelines for Nighttime Overhead Sign Visibility

2017 ◽  
Vol 2617 (1) ◽  
pp. 27-34
Author(s):  
Paul J. Carlson ◽  
Brad Brimley ◽  
Susan T. Chrysler ◽  
Ron Gibbons ◽  
Travis Terry
Keyword(s):  
Reference Material ◽  
Task Force ◽  
Visual Complexity ◽  
Recognition Task ◽  
Lighting Design ◽  
Design Guide ◽  
Roadway Lighting ◽  
Recommended Guidelines ◽  
Open Road

Guidelines for the provision of effective nighttime performance of overhead signs were developed. Relevant policies and guidelines with regard to sign lighting currently provide little useful information to determine when sign lighting is needed, and the reference material available to practitioners is out of date. Two complementary nighttime visibility studies were conducted, which were designed to produce results useful in developing updated guidelines for overhead sign visibility. The first was conducted on a closed course and investigated the legibility distances of three sign legend and background configurations under various sign lighting treatments. The second was conducted on the open road. It investigated the effects of sign luminance and visual complexity on the distance at which a driver can read overhead signs during a recognition task. The combined findings were used to develop revised guidelines designed to provide adequate nighttime visibility of overhead signs. The proposed guidelines are based on the needs of nighttime motorists and have been formatted specifically for AASHTO’s Roadway Lighting Design Guide, which is being updated. The revised chapter on roadway sign lighting was provided to the AASHTO task force responsible for revisions. The guidelines include a list of recommended retroreflective sheeting materials that can be used to meet nighttime driver needs for specific complexity levels.

A new methodology for calculating roadway lighting design based on a multi-objective evolutionary algorithm

2013 ◽  
Vol 40 (6) ◽  
pp. 2156-2164 ◽  
Author(s):  
Daniel Gómez-Lorente ◽  
O. Rabaza ◽  
A. Espín Estrella ◽  
A. Peña-García
Keyword(s):  
Evolutionary Algorithm ◽  
Lighting Design ◽  
Multi Objective ◽  
Roadway Lighting

USEFUL CONTRAST INDEX FOR ROADWAY LIGHTING STANDARDS

2021 ◽  
Author(s):  
A.R. AbouElhamd ◽  
R. Saraiji
Keyword(s):  
Lighting Design ◽  
Contrast Threshold ◽  
Visual Environment ◽  
The Road ◽  
Roadway Lighting

This article proposes a new metric for roadway lighting design that has the potential to improve visibility for drivers during nighttime. The new metric is named as Useful Contrast Index (UCI) and it relates the contrast of obstacles (targets) to the contrast threshold. We define the useful contrast index as the percentage of targets that have a contrast value greater than the contrast threshold along the length of the road. We conclude that the Useful Contrast Index has merit and could be used to provide a better visual environment for drivers.

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