Masters Theses
Abstract
"LED (light-emitting diode) technology is being widely adopted for use in sustainable traffic signal management. However, the useful life and luminosity characteristics have not been sufficiently studied in the field to provide departments of transportation with cost-effective replacement strategies based on the realities for LED indicators. LED indicators fail when their luminous intensity (LI) falls below a pre-specified threshold, posing a danger to traffic. This research details a field study of LED indicators in Missouri and develops a replacement schedule based on key findings. Rates of degradation and subsequently the useful life of each type of LED indicator were calculated using a deterministic regression model. Results of this research provide a methodology for engineering managers in state departments of transportation and local communities in identifying best practices and replacement standards for LED indicator technology"--Abstract, page iii.
Advisor(s)
Long, Suzanna, 1961-
Committee Member(s)
Qin, Ruwen
Gosavi, Abhijit
Department(s)
Engineering Management and Systems Engineering
Degree Name
M.S. in Engineering Management
Sponsor(s)
Missouri. Department of Transportation
Mid America Transportation Center
Publisher
Missouri University of Science and Technology
Publication Date
Spring 2011
Pagination
ix, 80 pages
Note about bibliography
Includes bibliographical references (pages 77-79).
Geographic Coverage
Missouri
Rights
© 2011 Casey Robert Noll, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Traffic signs and signals -- Maintenance and repair
Electronic traffic controls -- Maintenance and repair
Electronic traffic controls -- Testing
Traffic signs and signals -- Missouri
Light emitting diodes
Thesis Number
T 10206
Print OCLC #
863153209
Electronic OCLC #
909599675
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.
http://merlin.lib.umsystem.edu:80/record=b10158417~S5Recommended Citation
Noll, Casey Robert, "Life expectancy evaluation and replacement schedule development for LED traffic indicators" (2011). Masters Theses. 4498.
https://scholarsmine.mst.edu/masters_theses/4498
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