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

Details

• Creators:
  Long, Suzanna ; Qin, Ruwen ; Crow, Mariesa ; Wu, C.H. ; Schmidt, Sean ; Digraskar, Snehal ; Kothapalli, Venkat Sravan
• 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:
  • Light emitting diodes
  • Service life
  • Equipment replacement
  • Regression analysis
  • Traffic signal indications
  • Statistical analysis
• 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
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20381/dot_20381_DS1.pdf
• File Type:
  [PDF - 1.80 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f1151ff55047329d5153452d84fd03ae1c6ff67bf4df05e9fa444a5b3e433aa70e6a1864872c9869a5124ae9beca00013af06127959442594341877be591df55