It'd be nice if we had some more rail expansion. Rails are so efficient, and are just more impressive mechanically the entire system is like a giant computer with actual switches. There was an article posted here a while ago about how rare train accidents are and how incredibly fail safe those systems are.
1. (As others have mentioned) a lot of freight is intermodal so containers in particular shipped for long distances by train also travel by truck for the first and last X miles.
2. A lot of freight is relatively local in nature, so it makes more sense for it not to be intermodal.