Optimizing Lighting Conditions for Nighttime Highway Construction Operations
Hyari, Khalied Hesham Radwan
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https://hdl.handle.net/2142/83241
Description
Title
Optimizing Lighting Conditions for Nighttime Highway Construction Operations
Author(s)
Hyari, Khalied Hesham Radwan
Issue Date
2004
Doctoral Committee Chair(s)
Kaled El-Rayes
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
"First, a practical framework named Construction Visual Requirements Framework "" CONVISUAL"" is developed to establish objective lighting design criteria for nighttime highway construction in order to minimize the subjectivity and discrepancy in available lighting standards adopted by different DOTs. The framework can be utilized by state DOTs as performance-based criteria that quantifies and assigns the required lighting levels for various construction tasks. Second, a lighting design model, ""CONLIGHT"", is developed for nighttime highway construction. The model performs lighting calculations that evaluate the impact of all lighting design parameters on the lighting design criteria. Four computational modules are included in the CONLIGHT model to calculate average illuminance, lighting uniformity, glare, and cost. The model can be utilized to verify that the selected lighting arrangement complies with all lighting design requirements. Third, a decision support system is developed utilizing the CONLIGHT model and a multi-objective genetic algorithm. The developed system is capable of: (1) maximizing average illuminance on construction sites; (2) maximizing lighting uniformity in the work zone; (3) minimizing glare to workers and road users; and (4) minimizing lighting costs, simultaneously. The system provides near optimal trade-offs among the aforementioned conflicting design objectives."
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