I doubt it. It took 5 years to build the first 515 km Shinkansen line, in Japan. A coast to coast railway is a major project. 1 year is not a reasonable timeframe. Infrastructure is slow to build.

It took 5 years of construction to open the south east TGV line, 7 years to complete it.

It took 24 years to construct I-90 from coast to coast, and that's with most of the east coast segments being preexisting toll roads.

All major Infrastructure projects are slow. Your timeline is not realistic.