Optimal lighting arrangements for nighttime highway construction projects

Khaled El-Rayes, Khalied Hyari

Research output: Contribution to journalArticlepeer-review


This paper presents a decision support system for optimizing temporary lighting arrangements in nighttime highway construction projects. The system is developed as a multiobjective genetic algorithm that 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. The system is designed to support decision makers in their search for practical lighting arrangements that provide various tradeoffs among these four conflicting objectives. Five decision variables are optimized in the present system, namely: number of lighting equipment, equipment positioning, mounting height, aiming angle, and rotation angle. The system is also designed to consider and satisfy all practical constraints that can be encountered in this lighting design problem. An application example is analyzed to illustrate the use of the system and demonstrate its capabilities in generating near optimal and practical lighting arrangements for nighttime highway construction projects.

Original languageEnglish (US)
Pages (from-to)1292-1300
Number of pages9
JournalJournal of Construction Engineering and Management
Issue number12
StatePublished - Dec 2005


  • Algorithms
  • Decision support systems
  • Highway construction
  • Light, artificial
  • Nighttime construction
  • Optimization

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Industrial relations
  • Strategy and Management


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