Based on the passage you provided from September 19, 1918, it seems that the author envisions a future where the integration of motor trucks with waterways would create a more efficient and streamlined logistics system. The focus on utilizing motor trucks to connect rural areas and inland villages to waterway stations indicates a recognition of the importance of land transport in facilitating commerce alongside waterways.
From your summarization, one possible assumption could indeed be that there was a complex network of transportation options (including waterways and highways) at the time, yet the full potential of this integrated system had not yet been realized. The highways, as implied, may not have been effectively leveraged for commerce at that point in history, primarily relying on waterways for the movement of goods.
The statement suggests that there could have been a misconception about the significance of highways, possibly indicating that some individuals at the time, such as Redfield, may not have fully grasped how crucial the integration of various transport modes would become for commercial efficiency. The passage overall points towards an evolving understanding of transportation logistics and the potential for greater efficiency through technological advancements and interconnected systems.