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

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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-2.16 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
Corporate Contributors:

United States. Dept. of Transportation. Research and Innovative Technology Administration
Subject/TRT Terms:

[+]

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

MATC-MS&T: 195 ; 25-1121-0003-195

MATC-MS&T: 195 ; 25-1121-0003-195 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Mid-America Transportation Center
Abstract:

The application of Light Emitting Diode (LED) lighting systems has experienced significant growth in the transportation sector over the past ten 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
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

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urn:sha256:b21fce83f6171b303822dc286831360cf007b4411e7a2797fd5ff3dc86fb3b71
Download URL:

https://rosap.ntl.bts.gov/view/dot/28302/dot_28302_DS1.pdf
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Longitudinal Useful Life Analysis and Replacement Strategies for LED Traffic Indicators

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