Complex sentence: Near the Ogdensburg International Airport, NY 37 interchanges with NY 812, which joins NY 37 here, and intersects NY 68 once more before leaving Ogdensburg.
Split into simpler sentences: Near the Ogdensburg International Airport, NY 37 meets NY 812 at an interchange. Here, NY 812 joins NY 37 and the two routes intersect NY 68 once more before leaving Ogdensburg.