Anybody know what the deal is with Henry Hudson Drive between the circle at the road up to Englewood Cliffs, and the Alpine Approach Road?

A couple times recently I've gone up Henry Hudson Dr from the GWB end, intending to do the climb up Alpine Approach Road, but HH Dr was barricaded at the Englewood circle. Each time I thought about going around the barricade, but decided against it.

Not sure if there's debris on the road, or construction? Has anyone sneaked through there to check it out?