State Route 280 (SR-280) is a 0.39-mile-long (0.63 km) state highway completely within Summit County in the northern portion of the U.S. state of Utah. SR-280 connects Interstate 80 (I-80) in Coalville to Main Street in the same town. The entirety of the highway is named 100 South.

Quick Facts State Route 280, Route information ...

State Route 280
100 South
SR-280 highlighted in red
Route information
Maintained by UDOT
Length	0.399 mi[1] (642 m)
Existed	1961–present
Major junctions
West end	I-80 / US 189 in Coalville
East end	Main Street in Coalville
Location
Country	United States
State	Utah
Highway system
Utah State Highway System Interstate US State Minor Scenic
← SR-279 → SR-282

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The highway begins at a diamond interchange on I-80 at exit 162 west of the center of Coalville and heads northwest on a two-lane undivided highway. SR-280 enters downtown Coalville and terminates on Main Street.^[2]

Prior to the construction of I-80, SR-4 (US-189) passed through Coalville on Main Street. To retain access to the town once I-80 replaced the surface road, the State Road Commission designated State Route 280 in 1961 as a short connection between I-80 and Main Street on Icy Springs Road (100 South).^[3] Before serving its intended purpose, the road briefly formed part of SR-2 (which had replaced SR-4 in 1962) and US-189, since I-80 was completed west of SR-280 before the portion east to Echo opened. A temporary ramp left the right side of SR-280 where the ramp to I-80 east now begins, and curved left into the westbound lanes of I-80 just before the Interstate crosses under SR-280.^[4]

The entire route is in Coalville, Summit County.

More information mi, km ...

mi[1]	km	Destinations	Notes
0.000	0.000	I-80 / US 189 – Salt Lake City, Cheyenne	Western terminus
0.399	0.642	Main Street	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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