Reconstruction of I-95/I-91/Route 34 Interchange, New Haven | Connecticut, US

CTDOT chose WSP to engineer and inspect the I-95/I-91/Route 34 interchange project, designed to reduce congestion and improve safety.


  • Connecticut, USA


  • Connecticut Department of Transportation (CTDOT)

Easing congestion and improving safety at a complex interchange

The I-95/I-91/Route 34 interchange in New Haven, Connecticut, is one of the busiest and most heavily traveled in the U.S.  Part of the busy northeast corridor between New York and Boston, the interchange is a vital connection for commuters.

The New Haven Interchange is a multilevel system of multiple highway and local road connections facilitating interstate-to-interstate commutes. The system accommodates daily traffic of more than 140,000 vehicles, which is more than three times the number it was originally designed to carry. More capacity was needed to safely accommodate the high volume of traffic and effectively move commuters, goods and services.

To relieve congestion, improve safety and enhance the quality of life of area residents, the Connecticut Department of Transportation (CTDOT) launched one of its largest and most comprehensive projects yet.

CTDOT selected WSP to provide construction engineering and inspection services on the transportation improvement project, which included replacement of more than 20 bridges and looping ramps, construction of multiple two-lane interstate-to-interstate connections, and improvements to local roads, two interstate highways and one state highway. To accommodate the additional lanes of the new Pearl Harbor Memorial Bridge, three new travel lanes were constructed on I-95 along with full shoulders, a new median barrier, signage, drainage and lighting.

The award-winning reconstruction project increased capacity, reduced congestion and improved safety — resulting in easier and more reliable commutes for Connecticut residents.