So - to clarify - it's the second busiest corridor, including all passenger services and freight combined over simple 2/3 double tracking with single track bridge bottlenecks. Their aspiration is to get full double track. Wow. Compared to the NEC which is quad-tracked for a good chunk?
I was under the mistaken impression that it was the 2nd busiest transit corridor in the country as per the topic of this forum room.