The NCDOT plans to reconstruct the I-40/I-77 interchange in Winston-Salem, NC in three phases from 2012-2017. Phase 1 will cost $90 million and involves constructing a diverging diamond interchange at I-40 and US 21. The entire project will widen both interstates to six lanes and cost $251 million total to improve safety and address increased traffic volumes. Public outreach will inform the community during construction.

1. N.C. Department of Transportation
The Construction of I40/I77 Interchange
August 9, 2012

2. I-40/ I-77 Need for Project
Very Important Crossroad of North Carolina
Built and opened in Late 1960’s
Has outlived its service life
Current configuration does not meet todays design
guidelines, i.e. weave distances, size of radiuses
Original Traffic Projections were 5000vpd, today the
traffic on both interstates is about 70,000vpd, this
is projected to be about 110,000vpd in 2035

3. I-40/I-77 Interchange
Project to Be Built in Three Phases
A I-40/US 21 Interchange and work along I-40 with
Ramps from I77 NB to I40 WB and ramp from I-40
WB to collector Dist.
B The I-40/I77 Interchange Proper
C Peripheral ends of Interstates

4. I-40/I-77 Interchange
Time Lines
I-3819A Let to contract June 19 2012
I-3819B Let to contract March 2016
I-3819C Post Year
R/W is being secured for entire corridor at this time

5. I-40/I-77 Interchange
What is being Built
I-40
Widen to six lanes from NC 115 to Old Mocksville Rd with
collector distributors at 21 (EB and WB)
I-77
Widen to six lanes from South of Broad St. to Jane Sowers
Construct Multi Level Interchange of the two
Interstates

6. I-40/I-77 Interchange
What is being Built
US 21
Reconstruct from just north of Glenway Dr. to BB&T south
of the interstate with a Double Diverging Interchange at I-40
Broad Steet
Widen from just past Lower Mall Entrance to just
past Cynthia Street

7. I-40/I-77 Interchange
New Bridge at Radio Rd.
New Bridge Davie Ave.
Broad Street Bridge will be reconstructed
Existing Interchange at Old US 64 will be closed
I-40/Old Mocksville Rd will be upgraded

8. I-40/I-77 Interchange
How Much will it cost?
Construction of entire project will cost approx.
$251,000,000.00

9. Final Configuration of
Interchange
I-40/I-77 Interchange
N

10. I-3819 A
What is being Constructed
I-40 WB Collector Distributor
I-40 WB complete to final configuration (Minus one lane)
Reconstruct Radio Rd Bridge
New Bridge over US 21 and 4th Creek
DDI Interchange at I-40 and US 21
I 77 NB ramp to I 40 WB
I 40 WB to I 77 NB and to Collector Dist.
Reconnection to Gaither Rd.
Noise Walls and Retaining Walls

11. I-40 at Old Movie Theater
N

12. I-40/I-77 Initial Interchange
N

13. I3819 A
Time Line and Cost
Construction to begin August 2012
Project Completion Date March 2017
Cost approximately $90 million
Bridges being built to accommodate future projects

14. I-3819A… US 21 DDI
What is DDI
1.DDI is Double Diverging Interchange
2.Will require traffic to cross over onto opposite
side
3.Eliminated the need for conflicting left turn
movements…thus eliminating conflicts and
congestion
4.Will allow US 21 to flow freely
5.Median Island will prevent left turns out

16. US 21
Reconstruct US 21 to 4 lanes with a median island
Sidewalks will be constructed on both sides
Median Island from 4th Creek Bridge south thru DDI to the
south end of construction, this will prevent left turns
Full access will be allowed at Carolina Ave. via a
signal

17. Gaither Rd
The two way traffic on the existing interstate ramp will be
closed off
Gaither will access US 21 via a new Rd from just beside
the Furniture Store and will intersect US 21 at a Signal at
Glenway Dr, between Chili’s and Wendy’s.

18. US 21 Gaither Rd Connection

19. Noise and Retaining Walls
Both Noise and Retaining Walls will be built:
Retaining Walls will be a combination of MSEs (Segmental
Precast Units) and Soil Nails with a shotcreate facades.
Noise walls will be precast modules with concrete piles, the
facade will be a simulated stone masonry pattern on both
sides.

20. Noise Walls
Noise Wall Locations:
I-40 Westbound
Begins directly across from Western Ave. Baptist Church
(just west of Radio Rd Bridge) and runs to where
Museum Rd. moves away from I-40
I-40 Eastbound
Begins at east side of Radio Rd and continues
down interstate and down ramp at US 21 to

21. Noise Walls
I-77 Southbound
Begins just south of Davie Ave and runs southward and
up ramp to Broad St.
Begins again at the Creek just south of Broad St and runs
southward to behind the Catholic Church

22. I-40/I-77 Interchange
NCDOT will do significant Public Relations
as the project nears and during the life of
the project
The project will have its own dedicated
Website where up to date information
will be posted

23. Contact Info
Contractor
Zachary Construction Corp.
www.zachryconstructioncorp.com
12625 Wetmore Road, Suite 301
San Antonio, Texas 78347
(210) 871-2700

24. Contact Info
NCDOT
John Cook, Resident Engineer
124 Prison Camp Road
Statesville, NC 28625
Email: jrcook@ncdot.gov
Phone: (704) 876-3543

25. Questions?
Feel Free to contact any
of the NCDOT Personnel
in attendance tonight.