Florida Department of TRANSPORTATION

State Road A1A/State Road 200 DDI I-95 Reconstruction Project

Overview

The Florida Department of Transportation (FDOT) began construction in January 2017 on the area’s first Diverging Diamond Interchange (DDI) at Interstate 95 in Nassau County. 

This project consists of widening the roadway from 4 lanes to 6 lanes with raised medians, curb & gutter, sidewalks and bicycle lanes (2 miles). This project will also include the addition of a new Diverging Diamond Interchange (DDI)* under I-95 at A1A Exit 373 (to Callahan/Yulee/Fernandina Beach/Amelia Island). The project began construction in January, 2017, and is expected to be completed by summer 2020.

Diverging Diamond Interchange (DDI)
 

A diverging diamond interchange (DDI) is a type of interchange where the two directions of traffic below I-95 briefly drive on the opposite side of the road. This will be a significant improvement in safety, since long left turns crossing traffic lanes to enter or exit the Interstate will be eliminated. Additionally, the DDI promotes added efficiency with only two clearance intervals (the time for traffic signals to change from green to yellow to red) instead of the six or more found in other interchange designs.

 

VIDEOS

3D Animation of a DDI
A DDI for pedestrians and bicyclists
Educational DDI video for Nassau County
Diamond Interchange vs DDI

Traffic Impacts

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Project Photos

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Project Details

Project Start:January 17, 2017
Expected Completion:Summer 2020
Cost:$40 million
Project #:210711-2
RoadsState Road 200, State Road A1A
CountiesNassau
CitiesYulee

Contact

Hampton Ray
386-269-3607

State Road A1A/State Road 200 DDI I-95 Reconstruction Project

Overview

The Florida Department of Transportation (FDOT) began construction in January 2017 on the area’s first Diverging Diamond Interchange (DDI) at Interstate 95 in Nassau County. 

This project consists of widening the roadway from 4 lanes to 6 lanes with raised medians, curb & gutter, sidewalks and bicycle lanes (2 miles). This project will also include the addition of a new Diverging Diamond Interchange (DDI)* under I-95 at A1A Exit 373 (to Callahan/Yulee/Fernandina Beach/Amelia Island). The project began construction in January, 2017, and is expected to be completed by summer 2020.

Diverging Diamond Interchange (DDI)
 

A diverging diamond interchange (DDI) is a type of interchange where the two directions of traffic below I-95 briefly drive on the opposite side of the road. This will be a significant improvement in safety, since long left turns crossing traffic lanes to enter or exit the Interstate will be eliminated. Additionally, the DDI promotes added efficiency with only two clearance intervals (the time for traffic signals to change from green to yellow to red) instead of the six or more found in other interchange designs.

 

VIDEOS

3D Animation of a DDI
A DDI for pedestrians and bicyclists
Educational DDI video for Nassau County
Diamond Interchange vs DDI

Project Details

Project Start:January 17, 2017
Expected Completion:Summer 2020
Cost:$40 million
Project #:210711-2
RoadsState Road 200, State Road A1A
CountiesNassau
CitiesYulee

Contact

Hampton Ray
386-269-3607
 
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