[thackney]

Due to the differences in vapor pressure, it would be difficult (expensive) to share a pipeline with gasoline & propane. Diesel, Gasoline, Jet Fuel typical all move in the same pipelines in batches.

Natural Gas requires even more expense to combine in the same line with liquids. At every compressor/pump station you have to separate them then recombine. I only know of it being done for long offshore distances, even then it is uncommon.

[topher]

Could some other product (gasoline, diesel) be transported across country and then propane refined from it.

It would probably be expensive, but it might help in the case of a shortage.

Some folks have only a weeks supply of propane in some of the bitterly cold areas, so something should be done...

[topher]

Would it be best to transport by barges as LNG up the Mississippi to get to St Louis, Chicago, Ohio River destinations, or is rail/truck the best way.

Seems like barges on the Mississippi might be a way to get LNG to sites North, and then refine to propane (or just send propane North as a liquified product).