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Project Details
Work Type Interchange Improvement
Phase Construction
Limits from east of CR 54 to west of Cypress Ridge Boulevard
Project Start January 2019
City
County
Road
Construction Cost $33 million
Estimated Completion Late 2021
Contractor D.A.B Constructors, Inc.
About

Driver Alert! >>> The exit point from westbound SR 56 to the entrance ramp onto northbound I-75 has been moved about 1/4 mile to the east (as of early Feb. 21, 2021). Be prepared to exit earlier than before!

This project will reconfigure the I-75/SR 56 interchange between CR 54 and Cypress Ridge Boulevard in Pasco County. The existing diamond interchange will be modified and converted to a diverging diamond interchange (DDI). The main change will be to diverge (cross) SR 56 traffic to the left side of the road through the interchange, and then cross vehicles back over to the right side of the road on the opposite side of the interchange. The changes will help to alleviate traffic congestion at this interchange to reduce travel time for motorists in this rapidly growing area.

The contractor anticipates completing the project in late 2021. This estimate does not include weather or other unanticipated delays.

A DDI was chosen for the I-75 / SR 56 interchange because of the proven ability of this traffic configuration to increase safety and capacity while using a large amount of the existing interchange footprint, including the existing bridge. The DDI was also chosen because of its ability to handle heavy left turn volumes, such as the westbound to southbound movement from SR 56 to SB I-75.

The expected benefits for the interchange are an increase in capacity and pedestrian safety while reducing vehicle delays and crashes. These benefits will be achieved by an increased number of lanes, improved pedestrian facilities, more efficient signal timings and reduced vehicle conflict points.

How will the DDI work?

Unlike a conventional diamond interchange -- no matter what direction you are driving on State Road 56 – you will diverge -- or cross to the left side of the road through the interchange, and then cross back over to the right side of the road, on the opposite side of the interchange.

The Diverging Diamond Interchange at State Road 56 will reduce vehicle delays by allowing traffic to enter the interstate without waiting at a left turn signal.  To do this, traffic is redirected from the right side of the bridge to the left side.

Signalized crossovers are positioned at each side of the interchange, and are designed to cross eastbound and westbound State Road 56 traffic with no turning movements at these two intersections. This design allows for more efficient signal timing, which reduces delay times, minimizes conflict points, and enables the interchange to more effectively handle higher volumes of traffic while eliminating the more serious crashes associated with a conventional interchange.

Other features and benefits of diverging diamond interchanges

  • DDIs operate under two-phase signal control, which reduces lost time, delays and queue lengths at traffic signals.
  • Safety features include lower design speeds between ramps and a reduction in the number of conflict points. The lower speeds result in less severe crashes.
  • Increased safety for pedestrians and bicycles.
  • Better sight distance at turns.

 

View Factsheet
Contact Information
Construction Manager
Anna Geismar
813-975-3553
Anna.Geismar@dot.state.fl.us
Media Contact
John McShaffrey
813-975-6930
john.mcshaffrey@dot.state.fl.us
Lane Closures
  • There are no lane closures at this time.
Project Files
Project Videos
Project Images
Looking north over I-75 at the SR 56 interchange (4/14/2021 photo)
Looking west over SR 56 at construction of the eastbound SR 56 ramp onto southbound I-75 (4/14/2021 photo)
Looking northwest over SR 56 at ramp construction on the west side of I-75 (4/14/2021 photo)
Looking northwest at SR 56 over I-75 and construction in all four interchange quadrants (4/14/2021 photo)
Looking southwest over SR 56 at construction of the northbound I-275/I-75 exit ramp to SR 56 (4/14/2021 photo)
Looking northwest over SR 56 (left side) at I-75 ramp construction (4/14/2021 photo)
Looking northwest over SR 56 approaching I-75 at the top of the photo (4/14/2021 photo)
Building the new eastbound SR 56 entrance ramp onto southbound I-75 (3/31/2021 photo)
Building the new eastbound SR 56 entrance ramp onto southbound I-75 (3/31/2021 photo)
Building the new eastbound SR 56 entrance ramp onto southbound I-75 (3/31/2021 photo)
Looking east at construction of the northbound I-275 / I-75 ramp onto eastbound SR 56 (3/31/2021 photo)
Looking northwest at SR 56 crossing over I-75 with construction in all four quadrants  (3/15/2021 photo)
Looking north over I-75 at the SR 56 overpass (3/15/2021 photo)
Looking northeast over SR 56 between Grand Cypress Drive (bottom) and I-75 (3/15/2021 photo)
Looking west over SR 56 at work in the median and northbound interchange ramps (3/15/2021 photo)
The free-flow right turn movement from the southbound I-75 exit ramp to westbound SR 56 has reopened (3/25/2021 photo)
Reconstructing the southbound I-75 exit ramp to SR 56 (3/4/2021 photo)
Looking west over SR 56 approaching I-75 - widening SR 56 and realigning interchange ramps (2/15/2021 photo)
Looking west over SR 56 and I-75 - construction of new ramp alignments in all quadrants (2/15/2021 photo)
Looking southwest over SR 56 on the west side of I-75 - reconstructing the interchange ramps (2/15/2021 photo)
Looking north over I-75 towards SR 56 - reconstructing the interchange to a diverging diamond (2/15/2021 photo)
Looking north at SR 56 over I-75 - construction of new ramp alignments (2/15/2021 photo)
Looking north over I-75 towards the SR 56 diverging diamond interchange construction (Dec. 13, 2020 photo)
Looking north over SR 56 at the I-75 interchange (Dec. 13, 2020 photo)
Looking west over SR 56 from the east side of the I-75 interchange (Dec. 13, 2020 photo)
Looking west at SR 56, on the west side of the I-75 interchange (Dec. 13, 2020 photo)
Looking east at SR 56 from Grand Cypress Drive (Dec. 13, 2020 photo)
Looking southeast at construction at the I-75 / SR 56 interchange (November 16, 2020 photo)
Looking north over I-75 at ramp construction at SR 56 (November 16, 2020 photo)
Looking west at construction on SR 56, east of I-75 (November 16, 2020 photo)
Looking west at interchange construction on SR 56 on the east side of I-75 (November 16, 2020 photo)
Looking west at construction on SR 56, west of I-75 (November 16, 2020 photo)
Detour map for closure of Southbound I-75 Exit 275 to SR 56
Detour map for closure of SR 56 ramp onto northbound I-75
On eastbound SR 56 approaching I-75, widening work is taking place in the median (October 15, 2020 photo)
New pavement construction on the north side of SR 56 approaching I-75
Work along the SR 56 entrance onto northbound I-75 (October 15, 2020 photo)
Median construction along SR 56, just east of Grand Cypress Drive (October 15, 2020 photo)
Construction in the SR 56 median at the traffic signals on the west side of I-75 (October 15, 2020 photo)
Median construction along SR 56, just east of Grand Cypress Drive (October 15, 2020 photo)
Work on the north side of SR 56, east of I-75 (October 15, 2020 photo)
Looking southwest at construction in the median of SR 56 near Grand Cypress Drive (September 15, 2020 photo)
Looking north at SR 56 over I-75 with construction along all interchange ramps (September 15, 2020 photo)
Looking west at SR 56 over I-75 (September 15, 2020 photo)
Construction along the northbound I-75 / I-275 exit ramp to SR 56 (September 15, 2020 photo)
Reconstruction of the SR 56 entrance ramp onto northbound I-75 (September 15, 2020 photo)
Looking west at construction on the north side of SR 56 approaching I-75 (September 15, 2020 photo)
Looking north on I-75 at the SR 56 interchange (May 19, 2020 photo)
Looking east at interchange construction on SR 56 on the east side of I-75 (May 19, 2020 photo)
Looking east at interchange construction on SR 56 on the west side of I-75 (May 19, 2020 photo)
Looking west at construction in the median of SR 56, west of I-75 (May 19, 2020 photo)
Detour map for closure of northbound I-275 / I-75 exit ramp to SR 56
Detour map for closure of southbound I-75 ramp to westbound SR 56
I-75/SR 56 Diverging Diamond Interchange (DDI) - April 2020
I-75/SR 56 Diverging Diamond Interchange (DDI) - April 2020
I-75/SR 56 Diverging Diamond Interchange (DDI) - April 2020
I-75/SR 56 Diverging Diamond Interchange (DDI) - April 2020
I-75/SR 56 Diverging Diamond Interchange (DDI) - April 2020
Detour map for closure of Southbound I-75 Exit 275 to SR 56
Work next to the SR 56 entrance ramp onto northbound I-75
Workers build a wall on the north side of SR 56, east of I-75