Did you Know:
  • PCIDs assist in accelerating, providing seed money and building needed infrastructure projects that local and state governments cannot afford. Projects are based on a business case for investment that will produce the best return for the economy and quality of life in Perimeter.
  • The Perimeter CIDs and their partners are making a difference in the lives of workers, residents and visitors in the Perimeter area with these transportation improvements to improve connectivity and access.
  • PCIDs provide a solid return on investment for their funds that are matched by their local and state governments.
  • PCID dollars can only be used for certain purposes as indicated by their individual State Legislation and local agreements.
  • PCIDs tax is a self-imposed additional commercial property tax paid voluntarily by commercial property owners, not residents.
  • PCIDs access matching funds from governments from specified accounts budgeted for the purpose of keeping safe, efficient roads and transit alternatives.
  • Perimeter businesses employ approximately 100,000 people.


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The Perimeter corporate market is an urban activity center rich with amenities, more than 100,000 jobs, 3 MARTA rail stations, pedestrian friendly sidewalks and enhanced connectivity. The PCIDs aim to create a multi-modal model that provides transportation choices for people within the market. These options create opportunities to stimulate economic development which equates to business prosperity and future jobs for Georgians. The Automated Traffic Management System (ATMS) is a prime example of the PCIDs commitment to the future growth of the Perimeter area.

In 2008, the PCIDs began the process of upgrading traffic signal control equipment and communications hardware to allow coordination of signals, reduce congestion and improve safety. The benefit of the ATMS is its ability to keep traffic signals in coordination at all times as it constantly monitors to confirm synchronization. To ensure this, approximately every 5 to 10 minutes the main computer syncs all the clocks in each traffic signal computer to the second.  The ATMS also removes the task of having to go out and manually check and sync signal clocks. As long as peak performing timing plans are implemented (am peak, noon and pm peak), the fiber is connected to each signal and each signal is constantly being checked by the main computer to confirm synchronization, the need to make adjustments is fairly rare. If new timing plans are necessary, those plans can be imported into the main computer and then disseminated to all the signals with a few key strokes.

The future possibilities of the ATMS network are impressive, as it provides an opportunity to link communication across jurisdictions in the PCIDs area. Once in place, traffic patterns can be seamlessly monitored from traffic center to traffic center. The ATMS also has the capacity to provide instant access for police and rescue as well as real-time traffic information to drivers. This equates to better, faster and more efficient communication.

The goal of the PCIDs is to attain the highest level of truly automated synchronization that spans multiple jurisdictions and provides seamless traffic monitoring throughout not only the entire Central Perimeter area but the Cities of Dunwoody and Sandy Springs and unincorporated DeKalb County.


Perimeter residents and visitors have many choices when it comes to getting in and out of the market. With interstate access available at so many different points, including I-285 at Ashford Dunwoody Road, I-285 at Peachtree Dunwoody Road, GA400 at Abernathy Road, and in 2011 GA400 at Hammond Drive , transportation choices are what set the Perimeter district apart. Despite offering many options, as one of the largest employment centers in the Southeast, traffic congestion can become an issue.  Fortunately, a history making transportation innovation is scheduled for delivery in Perimeter: The Ashford Dunwoody Diverging Diamond Interchange (DDI).

In June 2010, Governor Sonny Perdue announced the approval of $10 million in grant funding for eight transportation infrastructure projects in Metro Atlanta developed by CIDs that focus on improving mobility and congestion in business centers. In addition, the State Road and Tollway Authority (SRTA) approved parameters for financing transportation infrastructure loans totaling up to $4 million. Funding for the grants and loans will be provided by the Georgia Transportation Infrastructure Bank (GTIB), a revolving infrastructure investment fund established in 2008 by Georgia legislators as a part of Governor Perdue's legislative agenda. The PCIDs were awarded $800,000 for the Ashford Dunwoody DDI.

The Ashford Dunwoody DDI is a capacity and safety improvement project intended to assist in relieving the severe congestion along Ashford Dunwoody Road in the critical area surrounding I-285 without replacing the existing bridge. The interchange has been the subject of traffic studies and design concepts for over 20 years. With an estimated 54,000 trips a day, it is currently operating above capacity and causing potential safety and operational issues on Ashford Dunwoody Road. The interchange requires upgrades to address these problems and the DDI concept is a cutting edge, design method proven to mitigate additional capacity without constructing new lanes. The DDI project concept will be implemented and open to traffic within two years of the preliminary engineering notice to proceed, much faster than any full interchange reconstruction.


The PCIDs are committed to building an inviting and safe pedestrian paradise. Part of this commitment can be seen in the numerous intersection redesigns complete with lighting, street furniture and countdown signal timers. This technology can be found throughout the district. The following is a step-by-step tutorial that we hope will encourage you to take the opportunity to get out and enjoy the beautiful fall weather - safely!

  • The pedestrian crossing is only activated when a pedestrian pushes the pedestrian crossing button.
  • Pressing the pedestrian crossing button does not mean it will immediately display a white lit pedestrian signal to walk, but puts the signal in the queue.
  • Once the white lit pedestrian signal is displayed, the pedestrian may enter the roadway and proceed across.
  • The pedestrian signal is designed to notify the waiting pedestrian they may start their crossing.
  • When a red lit signal starts to flash indicating to the pedestrian that they need to clear the intersection. This flashing red lit signal is designed to deter potential new pedestrians approaching the intersection from crossing. They must push the button and wait for a new sequence to cross.


During an online survey conducted by PCIDs, residents, visitors and employees in the Perimeter provided feedback on future projects they wanted to see in the market. Of the more than 200 responses, many people said that sidewalks on Hammond Drive topped their PCIDs project wish list. We are excited to announce that on August 31st, the PCIDs completed the sidewalk project on Hammond Drive which provides brand new sidewalks that stretch from the Dunwoody MARTA station on Perimeter Center Parkway to Hammond Drive and create a safe, barrier-free environment for employees and pedestrians. Have you taken advantage of this new improvement? Let us know at


The Honorable John Lewis spoke to more than 100 business leaders at the Perimeter CIDS Executive Roundtable at the Cox Enterprises, Inc., Headquarters in Sandy Springs on August 20, 2010.    He spoke with passion and conviction to help make Atlanta the Capitol City of the 21st Century.  He spoke of unity and moving Atlanta toward the transportation systems that would bring continued prosperity to Atlanta, the region and the State.   The Congressman expressed his support and appreciation of the work of the CIDs in the Metropolitan area and how they have joined in partnership with local, state and federal governments and agencies to make transportation infrastructure improvements in their communities.

The Congressman also spoke in support of the Revive I-285 Top End Study which includes a planned transit component reaching from Cumberland to Perimeter to Doraville.  He spoke about the importance of transportation access and its ability to create a good environment for business.  More business means more jobs.


A major project to relieve traffic congestion and provide a new gateway into the economically important Perimeter market continues at Hammond Drive and Georgia 400 and is on target for completion in August 2011.

Construction started in early November 2009 on the nearly $18 million project to build entrance and exit ramps from Hammond Drive to Georgia 400 and replace the four-lane Hammond overpass with a nine-lane, higher bridge to meet current and future traffic volumes.

"This much needed transportation improvement is a model of what public-private partnerships can achieve," said Perimeter Community Improvement Districts (PCIDs) President and CEO Yvonne Williams. 

The Georgia Department of Transportation (GDOT), the PCIDs and the city of Sandy Springs Development Authority are partners in the project.  GDOT is furnishing the $12 million cost of the bridge, the PCIDs are providing $5.5 million for the ramps and the Sandy Springs Development Department provided the financing for the PCIDs' contribution, saving the not-for-profit organization $500,000.  The contractor will continue working on the retaining walls as well as installation of proposed drainage structures, the state transportation agency said.

Some work will be conducted at night on Hammond Drive for the installation of drainage pipe.  The earthwork adjacent to Georgia 400 north bound is almost complete and an earth berm will be constructed for the installation of the sound barrier, GDOT also said. 

"The Hammond Half Diamond Interchange and bridge project had been planned for more than three years, but the PCIDs jump started it by placing funding upfront into the project," Williams noted.  The project was the only one GDOT let in the final quarter of 2008. 

"This project will be a tremendous asset to the business and residential areas of Perimeter," Williams said.  "In addition to improving traffic congestion and safety, it will open up development and jobs at this major corridor.”