Tennessee State Route 474

{{Short description|Former state highway in Tennessee, United States}}

{{Use American English|date=May 2025}}

{{Use mdy dates|date=January 2025}}

{{Infobox road

|state=TN

|route=474

|type=Sec

|alternate_name=Merchants Greene Boulevard

|established=2000s

|decommissioned=2020

|maint=TDOT

|length_mi=1.4

|length_ref={{cite map|url=http://www.tdot.state.tn.us/Maps/county/co32.pdf|format=PDF|title=General Highway Map of Hamblen County, Tennessee|publisher=Tennessee Department of Transportation|year=2009}}

|direction_a=South

|terminus_a={{jct|state=TN|TN|160}} southwest of Morristown

|direction_b=North

|terminus_b={{jct|state=TN|US|11E}} in Morristown

|counties=Hamblen

|previous_type=Sec

|previous_route=462

|next_type=Sec

|next_route=476

}}

State Route 474 (SR 474, known as Merchants Greene Boulevard) was a {{convert|1.4|mi|km|adj=mid|-long}} five-lane state highway in Hamblen County in the eastern portion of the U.S. state of Tennessee. It served as a connector route from SR 160 to US 11E/SR 34. It was decommissioned and designated as part of SR 66 following an extension project by TDOT in November 2020.{{cite web |title=SR 66 Extension Now Open in Hamblen, Jefferson Counties |url=https://www.tn.gov/tdot/news/2020/11/5/sr-66-extension-now-open-in-hamblen--jefferson-counties.html |website=Tennessee Department of Transportation |access-date=May 23, 2021 |date=November 5, 2020}}