Shouldn't the trucks be more used for "last mile" operations from the cargo trains vs going very long distances and needing to go very fast? Seems like that would be the more appropriate solution.
Interestingly, the freight train network in the US is a lot better than that of Europe and Asia. A much larger fraction of goods is delivered by train in the US at a higher efficiency.
> the freight train network in the US is a lot better than that of Europe and Asia
That depends a lot on how you look at it. The US got screwed by geography and doesn't have a lot of inland waterways. This means that rail freight is the only viable option for a lot of bulk cargo. The US is sending an awful lot of coal and grain via train, but in Europe most of that is done by river and canal.
The US also has a rather poor record quality-wise. Electrified rail basically doesn't exist, precision-scheduled railroading has made delivery times a joke, the infrastructure is crumbling, and freight trains are utterly incapable of playing nice with passenger rail. Heck, they are literally running trains which are too large to fit on the railways! It has been optimized for dirt-cheap bulk transport and as a result it isn't really capable of doing anything else.
The fact that US railways have such high tonne-miles, despite the state of the railways, says more about the complete lack of competition than it says about the railways.
Cargo shipping is a mix of all modes. Rail has a lot of good things going for it, but capacity is limited, routes are limited, speeds are limited, and trains are fairly inflexible.
Trucks can be used for a lot more things. They might not be ideal for long distance routes, but they're often used for them. Dock to dock time is often going to be far less with long haul trucking than truck to local train depot, rail to remote train depot, truck to remote dock.
It's also much harder to build rail capacity than road capacity; certainly that'a a function of our government, but someone with one container to move has to work within the environment.
Trucking also feels like it has more agency. If your truck fails, you can send another to pick up the load; if your train fails, you're at the mercy of the railroad. If there's disruptive weather in the path, a truck can drive around it; almost always a train will have to stay on its route, and may need to stop for the weather to clear. If the shipment needs to be recalled, the truck can turn around; you might be able to get your load off the train, but maybe not?
I have no specialized knowledge in this, but I don’t think that cost efficiency is the primary reason for using trucks over trains. Because, if it was, rail with last mile by truck would probably win. Rail has a very low cost per mile by weight rate. But, it can be slow. Particularly when you consider that there are only a few routes across the country (across the Rockies), and trucks can go directly from point A to point B without needing to connect to a rail hub at both ends.
In someways it seems similar to why the hub and spoke model has fallen out of favor for airlines. It might be more efficient to have one large flight between hubs and two small flights to regional airports, but passengers would rather have a direct flight.
Maybe, but the semis are also faster due to bureaucratic reasons involving train operators, which are mostly state owned companies in Europe. So p derivate enterprises just hire a trucking company to deliver goods faster. Rail is mostly used for cement, oil products, fertilizer and grain.
For instance in my country the public train company is absolutely brain damaged as it doesn't have enough bike transportation spots (only some trains do). There are even trains with a bike symbol that you're not allowed with a bike on. Thanks to the EU Green Deal they are now forced to provide them.
https://www.marketurbanist.com/blog/why-americas-freight-tra...