Sumter County Road 478A comprises a 6.40 mile long loop north from SR 50 at Wilson Corners to SR 471 at the city of Webster. The Scenic Sumter Heritage Byway overlays all of the rural highway, continue east along SR 50 to the Van Fleet Trail and north along SR 471 to CR 48 at Bevilles Corner.

North
A reassurance marker stands west of the split intersection with County Road 755.
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CR 478A east of County Road 743.
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CR 478A runs along the Webster city line east to SR 471 (S Market Boulevard).
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South
A CR 478A confirming marker stands west of SR 471 at Webster.
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CR 478A is also T.W. "Bill" Graham Road.
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CR 478A crosses a canal leading east to Big Gant Lake beyond SE 120th Lane.
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County Road 755 provides a cutoff from CR 478A south to SR 50 west.
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CR 478A converges with SR 50 east of County Road 755. SR 50 is unmarked.
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Page Updated Tuesday February 16, 2021.