Other reports released in the last day or so indicate that several motorists had previously called 911 to report a minivan (of the same make and color as the one involved in this accident) driving erratically all the way down Route NY-17 and I-87 earlier that day. Reports included a woman driving the minivan was weaving through traffic, passing vehicles on the shoulder, etc.
Based on the description of the route, it looks like this whole scene apparently unfolded over a distance of 60-80 miles on these highways.