Worst Curves on the Northeast Corridor

[jis]

However, isn't it the case that every revenue passenger train that goes through Zoo Interlocking these days stops at 30th Street Station? Do the trains accelerate/decelerate slowly enough that even if the curves in Zoo Interlocking could support 150 MPH trains, the trains would have to go through there slower because of the station stop?

Not to mention slowing down for Girrard and Mantua interlocking at the two ends of the Schuylkill River Bridge. Actually the so called River Line that is used by through NEC trains has been cleaned up quite a bit. But lets face it, that area is never going to be 150mph or even 100mph anytime in my lifetime if ever.