Longitudinal useful life analysis and replacement strategies for LED traffic indicators.

Long, Suzanna; Qin, Ruwen; Crow, Mariesa; Wu, C.H.; Schmidt, Sean; Digraskar, Snehal; Kothapalli, Venkat Sravan; Missouri University of Science and Technology. Dept. of Engineering Management and Systems Engineering

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Longitudinal useful life analysis and replacement strategies for LED traffic indicators.

2014-04-01
By Long, Suzanna ; Qin, Ruwen ; Crow, Mariesa ; ...

[PDF-1.80 MB]

English

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Creators:

Long, Suzanna ; Qin, Ruwen ; Crow, Mariesa ; Wu, C.H. ; Schmidt, Sean ; ... More +

Long, Suzanna ; Qin, Ruwen ; Crow, Mariesa ; Wu, C.H. ; Schmidt, Sean ; Digraskar, Snehal ; Kothapalli, Venkat Sravan Less -
Corporate Creators:

Missouri University of Science and Technology. Dept. of Engineering Management and Systems Engineering
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Equipment Replacement Light Emitting Diodes Regression Analysis Service Life Statistical Analysis Traffic Signal Indications
Publication/ Report Number:

cmr14-012
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Missouri. Dept. of Transportation. Research, Development and Technology Division
Abstract:

The application of Light Emitting Diode (LED) lighting systems has experienced significant growth in

the transportation sector over the past 10 years. LED indication lifespans have significantly greater durations than

previous technologies, however, uncertainties in the duration of LED devices have unearthed challenges in

developing a replacement schedule of LED traffic indications. This research evaluates two methods to approximate

the useful life of LED traffic indicators. Previous research in LED indications used a lateral regression analysis to

determine the lifetime of LED indications. A new methodology is used to incorporate longitudinal regression analysis

as well as account for additional factors outside previous research methods. The findings of this report compare the

results using the new methodology against previous research recommendations. A discussion on the impact of the

updated results on transportation agencies’ policies is also included. Findings indicate that useful life of the majority

of LED indications is approximately two years longer than previously estimated.
Format:

PDF
Funding:

Project TRyy1310
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:2c67031ad399387a5fe22a0e7bcf897415b63f73846642ba5b7136476266bbfc
Download URL:

https://rosap.ntl.bts.gov/view/dot/20381/dot_20381_DS1.pdf
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Longitudinal useful life analysis and replacement strategies for LED traffic indicators.

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