I-40 is mostly (completely?) 75mph. IIRC, I-25 is, too.When one is trying to compete with the overall travel times of cars on a freeway, yes, 55 is a problem. Even with 79 MPH running, after factoring in station stops and slow zones for curves that can't be easily eliminated, it's hard to keep an average speed of 60 MPH. And most highways in NM have either 65 MPH or 70 MPH speed limits.This is the first time I have seen any information this solid about projected cost and hint at the current condition of that track. Maybe I am riding the city bus too much lately and my perspective on speed has changed, but does 55 mph on the current track seem that bad?
Just sayin'...