Diverging Diamond Delay

The Diverging Diamond Interchange now under construction at the junction of S.R. 56 and I-75 is expected to alleviate the traffic issues at arguably Wesley Chapel’s most congested point. (Photo: Charmaine George)

Pasco County Board of County Commissioners (BCC) chairman Mike Moore has always taken great pride in his efforts to expedite the construction of the Diverging Diamond Interchange (DDI) at the busy junction of I-75 and S.R. 56.

With help from state legislators, what was originally scheduled for a 2024 completion was moved up and expected to be finished by the fall of 2021.

However, that date is now very much in question, which has riled Moore, who represents District 2, which includes most of Wesley Chapel.

“It’s very, very disappointing,” he says.

Armed with letters from constituents and his own daily experience driving through the congestion at the under-construction interchange, Moore is disappointed to hear that the project — originally expected to cost $18.5 million but now carrying a $33-million price tag — could now drag on until the spring of 2022 or even later.

Which is why, when Moore drives by the project now and sees workers, well, not working, it makes him seethe.

His frustration was on full display at a BCC meeting last month, when Moore delivered a blistering attack on the company, D.A.B. Constructors, Inc., in charge of the project.

Moore said he recently drove through the interchange and took pictures of the general malaise happening. He said he saw two workers standing next to a truck doing nothing, and a second group of construction workers standing on a hill.

“On a project of that magnitude, those are the only people I saw working on a Monday, a sunny Monday, at 1:30 in the afternoon,” Moore said. “I think that’s insane, that’s ridiculous, that’s embarrassing.”

More than 100,000 vehicles pass through the interchange on a daily basis. The eagerly-anticipated DDI is designed to create fewer conflict points at the interchange, and despite looking like a confusing, diamond-shaped jumble of roads in pictures, Florida’s first Diverging Diamond Interchange (at Exit 210 of I-75, in Sarasota) has been lauded for being safer and more efficient than your traditional junctions. 

Businesses Are Unhappy, Too

The Wesley Chapel DDI will be Florida’s second, and Moore isn’t the only one disappointed that it is so far behind schedule. 

In September, the Cypress Creek Town Center Property Owners Association (POA) — which includes the Tampa Premium Outlets, Costco and more than 20 other businesses located west of the interchange, sent a letter to Moore and District 3 Commissioner Kathryn Starkey expressing concern about the progress of the interchange.

The POA, which said it has spent $25 million over the last 15 years “reconstructing and widening miles 

of highway in the State Road 54/56 corridor” to offset the additional traffic the Town Center attracts, said it reached out to the Florida Department of Transportation when it was becoming clear that the project was falling behind schedule.

It asked FDOT to accelerate the DDI during Covid-19, due to the reduction of traffic, but were told material deliveries had hindered the project and that D.A.B. Constructors “did not feel any substantial gains could be made.”

The POA wrote to Moore and Starkey that they were told the project was at least 200 days behind schedule — pushing the completion date to late summer of 2022.

“It’s very unfortunate that this is happening,” said Comm. Starkey, “but at least FDOT is doing as much as they can to push it along.”

Pasco County has no control over state road projects like the DDI, but Moore and Starkey both reached out to David Gwynn, the FDOT secretary for District 7, after receiving the letter from that group of angry businesses.

FDOT has taken efforts to remedy the situation, and could impose more penalties. Gwynn wrote back to Moore telling him if D.A.B. Constructors can’t meet the contracted end date, “liquidated damages, of $9,837 a day, will be assessed for every day that the contractor is late in completing the project.”

That means that for every month they are behind schedule, D.A.B. Constructors would incur a $300,000 fine.

Pasco’s BCC chair Mike Moore says D.A.B. Constructors “can’t handle it” when it comes to finishing the diverging diamond project on time.

The DDI construction kicked off in early 2019, and had an original schedule of 800 days, resulting in a finish date of April 2021. That did account for delays due to rain and holidays (though not for something like Covid-19, which did cause delays for materials for many area projects).

Gwynn wrote that in roughly 20 months, D.A.B. Constructors had been granted 99 days for weather, 34 days of holiday time and 30 days for unforeseen conditions. All told, that added 163 days to the contract, changing the end date to August 26, 2021.

“Ninety-nine rain days? I don’t how that is, but okay, I guess?,” Moore said. “I guess if it sprinkles outside they don’t work?”

Moore also found 34 days off for holidays “extreme.”

Moore wants to see FDOT come down hard on D.A.B. Constructors, including fines and heavy pressure. He went as far as to suggest D.A.B. “sub out every little piece of the project going forward…cut their losses, and get out.”

He doesn’t want the company used on any more projects in Pasco County, where it is currently working on 10 other projects, including the widening of State Roads 54 and 52.

“They have so many projects going on right now they can’t handle it,” Moore says.

Starkey worried that any further delays could impact the traffic for yet another holiday season in 2021, further hurting businesses in the S.R. 56 corridor.

Will The Diverging Diamond Fix The I-75/S.R. 56 Interchange?

This rendering of the recently-opened Sarasota DDI is nearly identical to what will will be built at S.R. 56 and I-75 in Wesley Chapel, which the major exception being I-75 passes over the intersection, while in Wesley Chapel S.R. 56 passes over I-75

A diamond could be a commuter’s best friend, according to the Florida Department of Transportation (FDOT).

A diverging diamond, that is.

That was the message delivered by Ryan Forrestel, PE of American Consulting Professionals, LLC, as he presented what he feels will be the solution to the snarled mess that is the S.R. 56 interchange of I-75 to the Greater Wesley Chapel Chamber of Commerce (WCCC) on May 23, during a meeting at the Mercedes-Benz of Wesley Chapel dealership located just a few hundred feet from where the construction of the diverging diamond interchange (DDI) will begin.

Forrestel, the consultant design project manager for the $24.1-million Diverging Diamond Interchange project, told a group of roughly 20 representatives from affected  businesses like Havertys, Tampa Premium Outlets, Chick-Fil-A, Florida Hospital Center Ice and others that it will be a good news, bad news proposition.

The good: engineers say the DDI is going to make traffic smoother and more efficient and in the long run yield improved results for local businesses.

The bad: during the long-awaited construction beginning in fall of 2018, the already-congested interchange is likely to become even more clogged.

No one, however, was surprised.

“I think this is a good opportunity for us,’’ said Stacey Nance, the general manager of TPO, located just west of the DDI. “Is it going to be cumbersome? Absolutely it is.”

Forrestel’s presentation seemed to assuage some of the concerns of representatives from those local businesses, many of whom are concerned that shoppers already are avoiding the area because of the traffic.

Ryan Forrestel

The project, moved up twice from its original 2024 and then 2020 start dates, is expected to expedite traffic through the much-maligned interchange, which handles roughly 100,000 vehicles a day and connects many of the residents of Wesley Chapel, Lutz and Land O’Lakes to Tampa.

Forrestel said he will have the DDI plans drawn up by January, and then in June of 2018, bidding will begin to find the company to build it.

Construction should start by the fall of 2018, and Forrestel said it could tentatively take anywhere from 18-36 months to build.

“We haven’t gotten that far yet,’’ Forrestel said. “That’s just a safe range.”

The timing of the construction is a concern to local businesses, as it will likely conflict with the busiest shopping time of the year.

“The fear was starting in the fall,” Nance said. “If there is any concern, it’s that it is hitting us all at prime time.”

Forrestel said the current LOS, or Level of Service, of the interchange is “F,” and “it is only going to get worse before it gets better” as development continues on the north and south sides of S.R. 56, both on the west and east sides of the interchange

Much of the traffic is caused by morning commuters trying to get on I-75 southbound, and evening traffic trying to exit northbound, which can back up two miles from where I-75 splits to S.R. 56.

“On the northbound off ramp and southbound on ramp, we’re making a lot of changes,’’ said Forrestel, who said he drives past TPO every morning and sees the eastbound traffic backing all the way up to Old C.R. 54 (or Wesley Chapel Blvd.).

As part of the DDI project, however, that mile-long backup during peak morning hours is projected to be reduced to 300 feet once a second lane is added to the exit for people getting on I-75 southbound.

The other change, which Forrestel describes as minor but really important, is widening the northbound off ramp. He said the original design had four lanes, with a center lane serving as a shared lane for travelers going east or west. But, they found that it created confusion for drivers and had a significant impact on the traffic, so the exit will be widened where the barrier wall on the east side of the ramp ends, and will now be five lanes.

Three of those northbound exit lanes will be dedicated to go west (turn left onto 56), and two lanes will be dedicated to go east (or right onto 56).

“It will be a significant improvement,’’ Forrestel said.

The first DDI in Florida was recently completed in Sarasota — at the University Pkwy. exit (No. 213)  — and has drawn positive reviews (including from Neighborhood News editor Gary Nager, who will provide a video tour of the Sarasota DDI in the episode of WCNT-tv that will premiere on YouTube and Facebook on Friday, June 9), after nearly four years of construction that involved rebuilding everything. Forrestel said that the Wesley Chapel DDI project will involve no expansion of the overpass, although it will be reconfigured, so it shouldn’t take nearly as long to complete.

The median on the bridge, as well as the current walkways, will be eliminated to create an additional westbound lane, and the bridge (which is technically two bridges) will be connected. Pedestrians will be able to cross right down the center of the bridge.

Forrestel added there will be plenty of signs directing drivers. The fourth eastbound lane on S.R. 56 is being pulled back 500 feet, so signs can alert commuters much sooner about the interchange directions.

“All of these changes will be improving the efficiency of the interchange dramatically,” Forrestel said.

The real key to making it all work, however, remains the DDI’s signature crossovers, where the east and westbound lanes appear to cross over. Though other solutions were considered for the interchange — like a flyover similar to what was built an exit south at Bruce B. Downs Blvd. — the DDI was chosen for its ability to handle large swaths of traffic from both directions.

“Huge left turns lanes work best for the DDI,” Forrestel said. “In some places, they are a great solution; in other place they are a terrible solution.”

The Wesley Chapel interchange, however, it is expected to move more cars through the interchange in a free-flowing manner, as the left turn lanes will no longer be crossing in front of other traffic and only entail two phases of lights.

Forrestel showed a video of a DDI in Atlanta (which can be seen at youtu.be/gY8xU-UAQWs) which has fewer lanes but otherwise resembles the one coming to Wesley Chapel.

Forrestel said the timing of the lights will be adjusted to accommodate the busier traffic in the morning and evening.

The scope of the DDI project takes into account a model that projects traffic out to 2038 and considers the lengthening of S.R. 56 (one of the signs at the interchange will point you to Zephyrhills, in fact) as well as projected land uses in the Wiregrass Ranch area.

Local businesses asked that they be kept updated so they can inform customers of the construction. “We want everybody to be prepared,’’ said WCC CEO Hope Allen.

‘Diverging Diamond’ Exchange For S.R. 56 At I-75 Moved Up To 2018 Start

Above is a rendering of a Diverging Diamond Interchange, like the one planned for the S.R. 56 exit off I-75, which has been moved up to a Fiscal Year 2018 start date. Source: FDOT.

Relief is coming to the congested, frustrating and oftentimes maddening S.R. 56 interchange of I-75 sooner than expected, as the Florida Department of Transportation (FDOT) announced it was moving up its plans to build a diverging diamond interchange (DDI).

That project is now slated to begin in fiscal year 2018, the beginning of which is July 1 of 2017.

“That is great news,” says Mike Moore, the new Pasco County Board of County Commissioners (BCC) chair who represents District 2, which includes most of Wesley Chapel. “I thought the diverging diamond was a great idea from the start, and the other commissioners did too. I’m glad we can start it sooner.”

Moore and District 38 State Rep. Danny Burgess (R-San Antonio) played key roles in getting the project, which will cost around $18.5-million, fast-tracked. FDOT officials presented their new proposal to the Pasco Metropolitan Planning Organization Dec. 8 at the Dade City Courthouse.

Construction of the DDI was originally scheduled to begin in 2024, but last November was moved up to 2020. The additional shortening of the timeframe will be good news to many travelers, especially around the holiday season, who have seen the lines of traffic to get off or on I-75 or through the interchange at S.R. 56 increasing.

DDIs, according to the website DivergingDiamond.com, are designed to create fewer conflict points when traveling through them, have better sight distance at turns, shorter pedestrian crossings and wrong-way ramps that are extremely difficult to access.

Despite looking like a confusing, diamond-shaped jumble of roads in pictures, the diverging diamond is said to cause virtually no driver confusion. A Springfield, MO, study showed a 60-percent reduction in collisions in a five-month period compared to a traditional exchange, and the website claims that in a five-year span of a DDI in Versailles, France, only 11 crashes have been reported.

Florida is building its first DDI at the University Pkwy. exit (No. 213) off I-75 in Sarasota. The Wesley Chapel location would be the state’s second DDI interchange.

The I-75/S.R. 56 junction continues to be one to avoid if at all possible for those in the New Tampa and Wesley Chapel area, and the 2.3-mile-long northbound exit routinely experiences back-ups of a mile or longer, sometimes even reaching the I-275 apex at the Pasco County line. The opening of the Tampa Premium Outlets on S.R. 56 west of I-75 last year hasn’t helped.

The S.R. 56/75 interchange was opened over a decade ago, and in 2011 a new ramp was constructed to ease congestion, to the delight of many in the community.

Roughly 100,000 drivers (combined heading east or west) pass through the I-75/S.R. 56 interchange, according to FDOT.

Steve Domonkos, the specialty leasing manager for the Shops at Wiregrass mall and a member of a Greater Wesley Chapel Chamber of Commerce (WCCC) transportation task force, is happy to see the DDI construction moved up. But, Domonkos worries that even by 2018, with the rapid rate of development happening in both Wesley Chapel and Lutz, it still may be too late.

The sooner the better, he says, “but sooner than sooner would have been even better. It’s great to hear they are finally moving it up because traffic is already horrendous,’’ Domonkos says. “It’s a shame that the state and county didn’t get together before the Outlets opened, though. That intersection is already maxed.”

Moore, who drives through the intersection almost daily, says he has heard the same complaints from his constituents. But he thinks they will be happy to see progress considering the project was initially slated to begin in 2024.

“This shows what can happen when everyone works together to get something done,’’ he says.

Public hearings on the DDI project were scheduled around the region on Dec. 14, which was after we went to press with this issue. The Florida DOT will accept written comments until Tuesday, December 27, through D7wpph.com, by U.S. Mail (Attn: Ed McKinney, Florida Department of Transportation, 11201 N. McKinley Drive, MS 7-500, Tampa, FL 33612) or by email to D7wpph@dot.state.fl.us.

New Design Being Considered For S.R. 56 Interchange

The diagram shows how traffic would shift to the opposite lanes of S.R. 56 above I-75 if a diverging diamond interchange (DDI) concept (in black) were applied to the busy intersection (in yellow).
The diagram shows how traffic would shift to the opposite lanes of S.R. 56 above I-75 if a diverging diamond interchange (DDI) concept (in black) were applied to the busy intersection (in yellow).

As traffic continues to back up daily a few miles north of New Tampa at the S.R. 56 exit from I-75 in Wesley Chapel — where the area’s newest outlet mall is set to open — state transportation officials are considering alternatives for reworking the I-75 interchange at S.R. 56 to improve the flow of traffic.Continue reading