The document summarizes a fiber optic network redesign for a transportation project. The original design had dual-sided duct banks along the roadway, but was redesigned to a single-sided duct bank to reduce costs and complexity. This eliminated 40 miles of civil works and technology on one side of the roadway. It reduced fiber splices and provided redundancy while saving $1.02 million and an estimated 230 man hours.

1. Fiber optic network redesign for transportation project
Brad Ring
Keywords: Technology leadership, System
engineering, Transportation, tolling, ITS, intelligent
transportation system, fiber optic cable, system
integration, design review, requirements review, cap ex, op
ex, testing, review, schedule, scalability, maintainability.
Description:
Technology optimization: Redesign dual-sided duct bank
to single-sided duct bank.
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2. Methodology
Review and analyze fiber architecture for
optimum design and configuration.
Goal: reduce cable acquisition, civil works, and
reduce maintenance complexity.
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3. Initial design
The example below illustrates the original design
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4. Revised design
Single-sided duct bank redesign
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5. Benefits of design review
 1. Eliminated 40 miles of civil works (trenching, conduits,
flowable fill) along one side of roadway.
 2. Eliminated 40 miles of technology (fiber optic cable, splices,
power, switches, routers, equipment cabinets) along one side.
 3. Significant reduction of fiber splices by running small
bundles of fiber cross-road instead of full 144 strand bundle.
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6. Participating stakeholders
 Brad Ring
 Multiple system integrators
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7. Project Impact
 Cost Savings: $1.02 Million per change request #1.
 Quality: Provides ramp-site redundancy at each
location.
 Operations and Maintenance: Reduced splices
improve network reliability and maintainability.
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8. Level of effort
 Estimated Man Hours: 230
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