Once Riverside Drive is open, they'll still have to leave the trail at Canal Park to cross the Lehigh River over the Hamilton Street Bridge, but then they'll be able to pick up Riverside Drive on the other side. And although only the 1.5 miles or so of roadway and developed path will be opening over the next two years, the rest of the trail will be passable because the railroad tracks and the industrial park are being removed, Garofalo said. That will likely allow clear passage all the way to Cementon, where a cyclist can then cross the Route 329 Bridge between Cementon and Northampton to link back up with the D&L Trail.