freight-train jump blues

Non-PRO English to Japanese Art/Literary Music

I know " freight-train " is a cargo train, and jump blues is a kind of blues, but altogether, what does it mean?
Is this also a variety of blues?

Covers of the Albert King staple "Crosscut Saw" and Sleepy John Estes's "Everybody Oughta Make a Change" boast the album's best blues fills and flurries, while the ＊freight-train jump blues＊ of Johnny Otis's "Crazy Country Hop" closes out the low-key LP with something more resembling a bang.