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TRIUNE Infrastructure Group

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TRIUNE Infrastructure Group

SR 91 Widening O'Brien to US 27

This project involved widening a four-lane divided expressway to an eight-lane divided expressway, stretching from O’Brien Road (Milepost 285.8) to the US 27 North interchange (Milepost 289.3).


Project Overview

The purpose of this project was to address future traffic demands projected for 2045, improve emergency evacuation times, and enhance safety within the corridor. The expansion increased roadway capacity and incorporated advanced infrastructure improvements to support these goals.


Project Leadership and Scope

Members of our team partnered as a subconsultant on this initiative, with a focus on delivering an expert lighting design to complement the roadway expansion and improve overall visibility and safety.


Design Features and Innovations

Our team led the lighting design, which included:

  • Installation of continuous LED lighting for superior illumination, energy efficiency, and reduced maintenance needs

  • Custom solutions for ramp lighting, under-deck lighting, and roadway lighting to meet diverse visibility requirements

  • Integration of a robust power infrastructure, including four power sources and 16 circuits

  • Advanced electrical design analysis, such as load calculations, short circuit assessments, voltage drop evaluations, and arc flash analysis


Coordination and Analysis

A daytime lighting assessment identified the need for enhanced visibility on overpasses, which was incorporated into the final design. The use of advanced software tools ensured precise fixture placement and spacing, optimizing lighting performance throughout the corridor.


Enhanced Safety and Efficiency

The lighting upgrades improved nighttime visibility and safety during adverse weather conditions, reducing accident risks and enhancing emergency evacuation capabilities. The use of LED fixtures also provided long-term energy savings and sustainability benefits, aligning with modern infrastructure standards.


For more information about this project and how our expertise can enhance your infrastructure, please contact us today!

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