Preliminary design of the Interchange 6 to 9 Widening Program begin in 2005, construction in 2009, and the new roadways officially opened to traffic in 2014.

NJ Turnpike Interchange 6 to 9 Widening Program

East Windsor, NJ

Making Way for Wider Highway

Steady elevations in New Jersey population and employment will increase New Jersey Turnpike traffic northbound by nearly 65 percent and southbound by 92 percent before 2032. The Interchange 6 to 9 Widening Program, the largest expansion in Turnpike history, brought six new lanes and a total of 170 new lane miles to one of the most heavily traveled sections of New Jersey highway.

During the preliminary phase, we conducted environmental studies and provided conceptual design for 20 miles of roadway, structural, drainage, and stormwater management facilities, which required new lane alignment as well as modifications to existing toll plazas, service areas, and maintenance yards. During the final phase, we were the prime designer responsible for relocating Interchange 8’s toll plaza and ramp, widening Routes 33 and 133, creating a new grade separated interchange, and relocating local roadways. We supported Section 7's final design through preliminary and environmental engineering, civil engineering for two road relocations, stormwater management, traffic maintenance, ITS design, and structural engineering for two local bridge reconstructions and four mainline retaining walls.


  • Recognition Award | ACEC National
  • Honor Award | ACEC NJ
  • Top Roads | Roads & Bridges
  • Best Regional Projects, Award of Merit | ENR
Search Term:
NJ Turnpike 6 to 9 Widening
  • transportation
  • State/Local
  • NJ Turnpike 6 to 9 Widening
  • infrastructure
  • energy

ISI Envision Rating System

pilot project

$200 million

below budget

3 awards

recognizing this project


  • Transportation


  • State/Local
  • Infrastructure
  • Energy


  • Northeast
  • transportation
  • State/Local
  • NJ Turnpike 6 to 9 Widening
  • infrastructure
  • energy


East Windsor, NJ

Completion Date



NJ Turnpike Authority


$180 million
  • Don discusses the major improvements and innovative design features used to meet the ambitious schedule for a recently completed portion of the ...
    Roads & Bridges