I-585 highlighted in red
|Auxiliary route of I-85|
|Maintained by SCDOT|
|Length||2.25 mi (3.62 km)|
|South end||US 176 / US 221 / SC 9 in Spartanburg|
|North end||I-85 Bus. / US 176 near Spartanburg|
I-585 is co-signed the entire length with U.S. Route 176 (US 176) and it uses US 176's exit number system instead of its own. Between exits 23 (I-85 Business) and 25B (US 221) the road is a freeway but has substandard or no shoulders. To the south of exit 25B, US 176 becomes boulevard grade, where I-585 ends.
This highway was once connected to I-85 from opening until 1995; that year, I-85 was moved north to bypass Spartanburg, leaving I-585 as an orphan, segregated from the rest of the Interstate Highway system. There is a project underway to extend I-585 along US 176 to I-85's new location. The ramps from I-585 southbound to I-85 Bus. north and south opened on October 9, 2006; subsequent ramps between the two roads have since been reopened including a large fly-over ramp that overpasses the East Campus Boulevard exit.
Currently, US 176 remains a freeway north of the I-85 Bus. interchange until a traffic signal with Upper Valley Falls Road, prior the interchange with I-85. Some vehicles on US 176 must cross oncoming traffic in order to access a some directions of I-85 as it is a typical diamond interchange.
Exit numbers are based on US 176 mileage. The entire route is in Spartanburg County.
|Spartanburg||2.25||3.62||—||US 176 east / SC 9 south (Pine Street)||Continuation as US 176/SC 9|
|||2.21||3.56||25||US 221 (Boiling Springs Road) / SC 9 north (Church Street / Whitney Road) – Chesnee, Roebuck, Boiling Springs||Signed exit 25B (US 221) and 25A (SC 9 northbound) for I-585 northbound; no northbound entrance from exit 25A; northern end of SC 9 concurrency|
|Southern Shops–Valley Falls line||0.00||0.00||23||I-85 Bus. – Charlotte, Greenville||Current northern terminus; signed as exits 23A (south) and 23B (north)|
|1.30||2.09||–||East Campus Boulevard – USC Upstate||Exit open, but not formally part of I-585|
|0.80||1.29||–||Valley Falls Road||Exit open, but not formally part of I-585|
|0.00||0.00||–||I-85 / US 176 west – Charlotte, Greenville, Inman||Future northern terminus; future western end of US 176 concurrency, diamond interchange|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Interstate 585 Business
|Location||Spartanburg, South Carolina|
|Length||1.60 mi (2.57 km)|
Interstate 585 Business (I-585 Bus) was a boulevard-grade business spur of I-585 along Pine Street, between Whitney Road (US 221) and St. John Street (US 29). It ran concurrently with US 176 and SC 9. Sometime between 2000 and 2012, the route was removed, with no current state or federal maps listing it, nor any physical signage.
- "Route Log and Finder List - Interstate System: Table 2". FHWA. Retrieved 2007-10-04.
- "Statewide Highways (shapefile)" (zip). South Carolina Department of Transportation. September 29, 2017. Retrieved December 8, 2017.
- Google (May 20, 2013). "Overview map of I-585" (Map). Google Maps. Google. Retrieved May 20, 2013.
- "Interstate 585". Retrieved 5 October 2014.[self-published source]
- Google (May 19, 2013). "Business Spur 585" (Map). Google Maps. Google. Retrieved May 19, 2013.