Project Map
I-40 Widening - Southeast Raleigh to Clayton Project Map
Project Fast Facts
  • Status: Projects Under Development
  • County: Johnston,Wake
  • Type of Project: Widening – addition of travel lanes
  • STIP Number: I-5111, I-4739
  • Estimated Cost: $330 million
  • Start Date: Fall 2018
  • Completion Date: 2022
I-40 Widening - Southeast Raleigh to Clayton Project Logo

Project Overview and Purpose

Planning and design efforts are underway to improve traffic on a 12-mile stretch of I-40 – from Raleigh to the I-40/N.C. 42 interchange in Clayton – which serves communities in Wake and Johnston counties, connects the region to I-95 and is a primary route to coastal tourism destinations.

An estimated 35.6 million vehicles traveled the roadway in 2015, making the stretch of I-40 subject to congestion and frequent delays – especially in the morning and afternoon rush hours.

With traffic expected to increase 65 percent by 2040, conditions will only worsen – especially around the I-40/N.C. 42 interchange, an area seeing a boom in residential and commercial growth.

Improvements would help ease congestion and delays as well as make travel safer throughout the heavily traveled area and better accommodate traffic due to future growth.

Project Highlights

I-40 Widening

Under its current proposal, the N.C. Department of Transportation would widen 12 miles of I-40, from I-440 (Exit 301) in Raleigh to N.C. 42 (Exit 312) in Clayton by adding two lanes in each direction.

The project team is developing roadway designs for the project and studying the designs' potential impact on the community and environment. Construction would begin in late 2018 and be complete by 2022.

I-40/N.C. 42 Interchange Upgrades

Improvements to the I-40/N.C. 42 interchange (Exit 312) and surrounding network of roads (including Cleveland Road) in Johnston County would allow the area to handle large volumes of traffic better.

NCDOT is evaluating design options that include:

  • A Diverging Diamond interchange for I-40/N.C. 42, in which two directions of traffic – guided by traffic signals, pavement markings and concrete barriers – cross over at traffic signals to get onto the interstate safely and quicker
  • A separate roadway – called a collector-distributor system – that would run parallel to I-40 and allow merging traffic from N.C. 42 to exit at a single point instead of having to merge into the flow of through-traffic on I-40
  • An interchange at Cleveland Road

Construction could begin as early as Fall 2020.

The project is being closely coordinated with the completion of the I-540 Outer Loop around the greater Raleigh metropolitan area.

Project History

Planning has been underway for years to improve traffic on I-40 from I-440 (Exit 301) in Raleigh to N.C. 42 (Exit 312) in Clayton.

The N.C. Department of Transportation began seeking input from the public in 2009 and, as design efforts began, held a regulatory coordination meeting with several state and federal agencies in 2011 to consider the purpose and need for the project and to designate design options.

Follow-up meetings have been held with regulatory agencies, the City of Raleigh and the Town of Garner to determine design constraints and coordinate overlapping plans.

In June 2014 and October 2017, NCDOT held public meetings and sought public feedback on the design options under consideration for widening I-40 and improving the I-40/N.C. 42 interchange.

Project Timeline

Milestone Dates*
Public hearing June 19, 2014
Public meeting Oct. 2, 2017
Environmental studies complete Late 2017
Design-build contract awarded Summer 2018
I-40 widening begins Late 2018 or early 2019
I-40/N.C. 42 interchange upgrades begin Fall 2020
I-40 widening complete 2022

* Future dates are preliminary and subject to change

Project Documents

October 2017 Public Meeting Maps

Contact Information

Brian Yamamoto, P.E.
Project Manager
(919) 707-6051
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Joey Hopkins
Division 5 Engineer
(919) 220-4600
Send a message

Robert Deaton
Assistant Project Manager
(919) 707-6017
Send a message

Resources for Local Property Owners

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.