Three interchange designs were developed for the project: 

  • Alternative A is a tight diamond that would carry U.S. 15-501 over Garrett Road. 

  • Alternative B is a tight diamond that would carry Garrett Road over U.S. 15-501.

  • Alternative C is an interchange with roundabouts at the ramp terminals of U.S. 15-501 and Garrett Road.


A public meeting was held on October 9, 2017 to present the alternatives and get feedback from the public.


Based on the public comments received and a preliminary evaluation of impacts and costs,

NCDOT selected Alternative A for detailed study in the project’s environmental document.

This Alternative is a 'Tight Diamond' interchange that would carry U.S. 15-501 over Garrett Road. 


Alternative A causes the least impact to the Durham-Orange Light Rail Transit project,

the least impact to properties at the intersection, and

meets the purpose and need of the proposed project. 


NCDOT considers many things when making decisions on transportation projects. 

On this project, items investigated include:

property impacts, cost, traffic operations, and impacts to the Durham-Orange Light Rail Transit Project (D-O LRT).  


The Durham Chapel Hill Carrboro MPO Comprehensive Transportation Plan articulates a desire for U.S. 15-501 between I-40 and U.S. 15-501 Bypass to operate at Level of Service (LOS) D or better. The projected traffic volume for 2040 is anticipated to exceed the capacity of the roadway and operate at level of service (LOS) F.

The intersection of U.S. 15-501 and Garrett Road is currently (2016) operating at LOS D and is projected to operate at LOS F in 2040. On average, drivers experience 45.1 seconds of delay during the morning peak and 46.6 seconds of delay during the afternoon peak. This delay is projected increase to 202.2 seconds of delay during the morning peak and 209.5 seconds of delay during the afternoon peak by 2040.


Level of Service (LOS) 

Project Timeline


Public Meeting
October 9, 2017  
Environmental Document Signed
November 27, 2018  
Right of Way Date
April 23, 2020  
FY 2026  
* Future Dates are subject to change 

Project Funding

This project is listed as Project U-5717 in the FY 2020-2029 STIP and is funded for $43.4 million.  


Estimated Cost*

Right of Way Acquisition, Utilities and prior costs
$ 11,400,000  
Construction Costs
$ 32,000,000  
Total Cost
$ 43,400,000  
* Cost as shown in Currently Adopted STIP and are subject to change 


The NCDOT project team will review all feedback – regardless of how it is submitted (online, phone, email, or letter) – and explore options to incorporate and address concerns where and when feasible.  NCDOT will continue to develop the project and present progress throughout the planning stage.



NCDOT conducted an open-house public meeting to present maps of the three alternatives being studied and receive feedback on October 9, 2017.  


Please Click on the links below to view or download Maps and Visualizations of the project alternatives. 



Alternative A  (Tight Diamond Interchange - U.S. 15-501 Over Garrett Road) 

Visualization of Alternative A   


Other Alternatives considered:

Alternative B  (Tight Diamond Interchange - Garrett Road Over U.S. 15-501)

                      Visualization of Alternative B 


Alternative C  (Teardrop Roundabout)   

                      Visualization of Alternative C    




Zahid Baloch, PE

NCDOT Project Manager

NCDOT Division 5

1548 Mail Service Center

Raleigh, NC  27699-1548


[email protected]






Although the N.C. Department of Transportation works to minimize the number of homes and businesses displaced by a road project, it is inevitable, in many cases, that a certain amount of private property is needed. The following information explains right of way acquisition and answers questions about the process.  


Relocation Assistance Brochure                             Asistencia para Reubicación      
Right-of-Way Acquisition Process Brochure          Folleto del Proceso de Adquisición de Bienes Raíces   
Right-of-Way Frequently Asked Questions

Question title

Would you like to be added to the project mailing list? If so please provide either an E-mail or USPS address.

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