I have the N scale acela on an oval layout with the recommended 19" radius curve. I have noticed that the Acela slows down going into the curves,much like the real thing,but I wasn't sure if this was normal for this set. Anyone heard of this?

Hello, I just purchased my N scale Acela set and have laid out a simple oval track. I was planning on adding a turnout so that I could have an additional train parked while running the other. I didn't want to run both trains at the same time. I'm using the ez track if that helps and I also have an additional Bachmann controller at my disposal. What would I need to accomplish this?