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If you’ve traveled on Colonial Boulevard near I-75 in recent months you have undoubtedly noticed the massive construction project that is currently underway to reconfigure the interchange to a Divergent Diamond Interchange (DDI). The construction project is expected to be complete by late 2024 and is intended to enhance access to I-75, as well as improve overall safety, increase capacity, and facilitate emergency evacuation within the County, according to the project summary on the SWFL Roads Colonial/I-75 project website.
Another DDI construction project is planned for the interchange at I-75 and Daniels Parkway. The project study began in 2021 and is currently in the design phase with construction expected to begin in 2025. SWFL Roads Danials/I-75 website.
But What is a Divergent Diamond Interchange?
A divergent diamond interchange (DDI) is a type of road intersection design that aims to improve traffic flow and safety, and features two diamond-shaped intersections, one on each side of the road. The key feature is that traffic lanes temporarily cross over to the opposite side of the road. Here’s how it works:
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Entering the Interchange: As drivers approach the interchange, they follow the usual right-side driving. However, just before entering the diamond, they cross over to the left side of the road.
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Crossover: At the diamond, traffic lanes crisscross. Vehicles move to the left side to access ramps or make turns.
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Exiting the Interchange: After crossing the diamond, drivers return to the right side of the road. This design reduces conflict points and enhances safety.
What are the Benefits: of DDIs?
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Reduced Left Turns: DDIs minimize left turns across opposing traffic, reducing the risk of collisions.
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Improved Flow: Traffic moves more smoothly due to fewer signalized intersections.
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Pedestrian Safety: Pedestrians cross shorter distances and have dedicated paths.
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