Editing Interstate 170 (section)

{{short description|Auxiliary Interstate Highway in St. Louis County, Missouri, United States}}
{{For|the former route in Baltimore, Maryland|Interstate 170 (Maryland)}}
{{Use mdy dates|date=August 2021}}
{{Use American English|date=April 2022}}
{{Infobox road
| state = MO
| type = I
| route = 170
| map = {{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=250|frame-lat=38.702|frame-long=-90.347|zoom=10|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Interstate 170}}}}
| map_custom = yes
| map_notes = I-170 highlighted in red
| alternate_name = Inner Belt Expressway
| length_mi = 11.17
| length_ref = <ref name="fhwa">{{cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |access-date=February 22, 2023 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref>
| established = 1956{{cn|date=June 2019}}
| spur_type = I
| spur_of = 70
| direction_a = South
| terminus_a = {{jct|state=MO|I|64|US|40}} in [[Richmond Heights, Missouri|Richmond Heights]]
| junction = {{jct|state=MO|I|70}} in [[Berkeley, Missouri|Berkeley]]
| direction_b = North
| terminus_b = {{jct|state=MO|I|270}} in [[Hazelwood, Missouri|Hazelwood]]
| counties = [[St. Louis County, Missouri|St. Louis]]
| previous_type = US
| previous_route = 169
| next_type = MO
| next_route = 171
}}
'''Interstate&nbsp;170''' ('''I-170'''), also known as the '''Inner Belt Expressway''', is an {{convert|11.17|mi|km|adj=on}} north–south [[auxiliary Interstate Highway]] in [[Greater St. Louis]], [[Missouri]]. I-170 connects to [[Interstate 270 (Missouri–Illinois)|I-270]] at its northern terminus and [[Interstate 64 in Missouri|I-64]] at its southern terminus. I-170 crosses its parent, [[Interstate 70 in Missouri|I-70]], near [[St. Louis Lambert International Airport]].