That's kinda their point. We have at least a partial solution, but the infrastructure is so under-maintained that it isn't up to the task. If we update the infrastructure, it should be safer than using semis, and produce less pollution.
Germany has a similar problem with it's main railroad service provider being a profit oriented company. Railroads don't necessarily make money or turn a profit. Instead they protect from damages by other means of transportation. That's my take on the matter, I'm sure I left many points unaccounted for