The project involves replacing a 98-year-old two track railway swing bridge that crosses the Hackensack River. It will be replaced with a bridge on either side, carrying a total of five tracks.

The northernmost bridge will be a three-track fixed bridge with 15m clearance for marine traffic. The second structure, south of the existing bridge, will have a movable 122m-long centre span with a 12m-high water clearance and will carry two tracks. It will be possible to raise the centre span by 3m via a vertical hydraulic lift that will be used about 10 times a year to accommodate the largest marine vessels navigating the river.