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.