Norfolk Southern Morrisville Line

Almost every morning there is usually a TOFC or double stack train on the NS Morrisville line next to Cabot Ave in Langhorne PA. The trains stop just before entering Morrisville Yard. They often sit for hours. Anyone know why they just sit there? Can the yard not accomodate them? I have never seen a train just go into the yard without first stopping there.

Thanks,
Mike

There are 2 trains per day in and out of Norfolk Southern Morrisville Trail Van yard. Apparently both will not fit at the same time. One train is often admitted about 9:30 a.m.

Thanks Jim.

Mike