Bangor Diverging Diamond Interchange

What's New

October 2022

Design for the DDI has been progressing. The project received a $26.6 million dollar grant from the federal government to help fund the replacement of the oldest portion of the overpass, modification of the other bridge, as well as modify the interchange. The current schedule is to advertise in 2025.

View VPI Presentation - March 15th, 2022


This page has information about the proposed Diverging Diamond Interchange at Exit 187 of Interstate 95 and Hogan Road in Bangor. Currently the Exit 187/Hogan Road interchange has safety concerns, congestion and no adequate bicycle and pedestrian access. There are three main issues with the existing interchange design:

  • Safety - there are three high crash locations, with 94 crashes in the latest three year period, 36% of which invovled injuries.
  • Congestion - The Exit 187 interchange is Maine's busiest diamond interchange with an average of about 35,000 vehicles per day.
  • Access - There are no sidewalks or adequate shoulders on the bridge.

A Diverging Diamond Interchange addresses these issues by:

  • Increasing safety by reducing crashes by approximately 50%.
  • Increasing mobility and reducing congestion.
  • Providing for a dedicated bicycle/pedestrian protected path within the width of the existing bridge.