Early termination is likely due to late arrivals which makes access to empty platforms unlikely, adding to further delays in getting rake to the yard and prepping it for return. For example, if the rake were to continue, it would take another 20 minutes to get there, possibly have to wait 10-15 minutes before a platform becomes available, then 15-20 minutes to take the rake back to yard (another 10 minutes or so). This adds almost an hour before the rake is in the yard which could affect return departure.