Debris on the Tracks Causes Delays on the 1, 2, and 3 Lines

When the #7 train arrives at Times Square I switch to the 1, 2 or 3 line for a short ride to 34th Street Penn Station to connect with New Jersey Transit.  Today I saw that the platform was packed, so I walked down the stairs and walked to 8th Avenue where I picked up the E train to continue to 34th Street.  It is nice to have alternative routes when there is a delay.  I found out that this was caused by debris on the tracks.  Another reason for a delay which was minimal for me.