United States Department of Transportation
i
Lifting HOV/HOT lane eligibility and shoulder use restrictions for traffic incident management.
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2013-12-01
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[PDF-3.64 MB]
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Abstract:This report presents an investigation of the possibility of lifting HOV/HOT lane eligibility and shoulder
use restrictions during major incidents on general-purpose (GP) lanes. Using traffic data from FDOT
Districts 4 and 6, the impacts of incidents of GP lanes on the operation of HOV/HOT lanes were
investigated. A methodology was developed to determine the appropriateness of diverting the GP
traffic to HOV/HOT lanes under different incident scenarios. The methodology is theoretically sound
and can be easily implemented in a spreadsheet tool requiring only a few critical inputs. The project
also reviewed the regulations in Florida concerning the operations of HOV/HOT lanes and concluded
that there was no legal obstacle or barrier that prevents opening HOV/HOT lanes to the GP traffic.
Consequently, a two-stage decision-making procedure was proposed to implement a diversion plan.
The procedure takes advantage of the existing partnership between FDOT and FHP on incident
management and should allow quick decision making and ensure the integrity and credibility of the
diversion policy. Lastly, the feasibility of shoulder use for incident management as well as simultaneous
use of other freeway management techniques such as variable speed limits and ramp metering were
investigated.
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