We live about 20 minutes from the Tap and cross it all the time on our trips to the lake. As Dave R said, the construction is for a new bridge parallel to the old one and when we last crossed it about a month ago, there was no affect on traffic. Much better than the GWB.
It is also an interesting sight to see all of the barges and cranes in the river doing the construction and the highlight is the HUGE super crane called "I Lift NY". Quite a sight to see.
here is more info:
http://gizmodo.com/i-lift-ny-meet-th...e-t-1651862140
Denis D