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{{short description|Highway in Montana}}
{{Redirect|I-115|the isotope of iodine (I-115 or <sup>115</sup>I)|Iodine-115}}
{{Infobox road
{{Infobox road
|state=MT
|state=MT
|type=I
|type=I
|route=115
|route=115
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-lat=46.00|frame-long=-112.55|zoom=12|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Interstate 115}}}}
|map=I-115 map.svg
|map_custom=yes
|map_notes=Interstate 115 highlighted in red
|map_notes=I-115 highlighted in red
|maint=[[Montana Department of Transportation|MDOT]]
|spur_type=I
|spur_of=15
|length_mi=1.194
|length_mi=1.194
|length_ref=
|length_ref=<ref name="MDT 1">[[#Log|Montana Road Log]], p.&nbsp;1</ref>
|established=1971
|established=1971
|direction_a=West
|direction_a=West
|terminus_a={{Jct|state=MT|I|15|I|90}} in [[Butte, Montana|Butte]]
|terminus_a={{Jct|state=MT|I|15|I|90}} in [[Butte, Montana|Butte]]
|direction_b=East
|direction_b=East
|terminus_b={{jct|state=MT|BL|15|dab1=Butte|BL|90|dab2=Butte}} in [[Butte, Montana|Butte]]
|terminus_b={{jct|state=MT|BL|15|dab1=Butte|BL|90|dab2=Butte}} in Butte
|counties=[[Silver Bow County, Montana|Silver Bow]]
|previous_type=I
|previous_type=I
|previous_route=94
|previous_route=94
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|next_route=117
|next_route=117
}}
}}
'''Interstate 115''' ('''I-115''') is a short [[List of auxiliary Interstate Highways|auxiliary Interstate Highway]] which connects Interstate [[Interstate 15 in Montana|15]]/[[Interstate 90 in Montana|90]] to [[Butte, Montana|Butte]] in the U.S. state of Montana. The highway is {{convert|1.19|mi|km|adj=mid|-long}} and is overlapped by Business Interstate 15/90 for its entire length. The route travels from an [[Interchange (road)|incomplete interchange]] with I-15/90 through generally rural areas in western Butte. It interchanges with Excelsior Avenue before terminating. The entire route was improved to interstate standards during the 1960s, and was improved in 2005.
'''Interstate&nbsp;115''' ('''I-115''') is a {{convert|1.194|mi|km|adj=mid|-long}} [[List of auxiliary Interstate Highways|auxiliary Interstate Highway]] which connects [[Interstate 15 in Montana|I-15]]/[[Interstate 90 in Montana|I-90]] to [[Butte, Montana|Butte]] in the U.S. state of [[Montana]]. The highway is [[Concurrency (road)|concurrent]] with [[Interstate 15 Business (Butte, Montana)|I-15 Bus.]]/[[Interstate 90 Business (Butte, Montana)|I-90 Bus.]] for its entire length. The highway travels from an [[incomplete interchange]] with I-15/I-90 through generally rural areas in western Butte. It also has an interchange with Excelsior Avenue before terminating. The entire route was improved to Interstate standards during the 1960s, and was further improved in 2005.


==Route description==
==Route description==
Interstate 115 begins at an interchange with [[Interstate 15 in Montana|Interstate 15]] / [[Interstate 90]]. As a two-lane highway in both directions, I-115 heads east into downtown [[Butte, Montana|Butte]]. Before reaching exit 1, eastbound traffic makes a curve while westbound traffic goes to Interstate 15/90 without making such a curve, therefore that portion of I-115 contains a large median. Approximately {{convert|1|mi}} from I-15/I-90, I-115 has its only interchange at Excelsior Avenue, which can be used to access the town of [[Walkerville, Montana|Walkerville]]. Excelsior Avenue is the only numbered exit along I-115, and the structure of the interchange directs motorists to stop and yield signs, as opposed to [[Traffic light|traffic signals]] for most exits in urban areas. I-115 ends at the overpass over Excelsior Avenue. It continues into [[Butte, Montana|Butte]] as [[Interstate 15 Business (Butte, Montana)|I-15 Bus.]] / [[Interstate 90 Business (Butte, Montana)|I-90 Bus.]].<ref name="Google Maps">{{Google maps|url=https://maps.google.com/maps?saddr=Exit+124&daddr=W+Iron+St&hl=en&ll=46.000539,-112.556906&spn=0.035952,0.055189&sll=46.004057,-112.5524&sspn=0.018094,0.027595&geocode=FY_4vQIda0RK-Q%3BFfX1vQIdVa9K-Q&mra=mrv&t=h&z=14|accessdate=December 20, 2013}}</ref><ref name="MDT 22">[[#Log|Montana Road Log]], p.&nbsp;22</ref>
I-115 begins at an interchange with [[Interstate 15 in Montana|I-15]]/[[Interstate 90 in Montana|I-90]]. As a four-lane highway with two lanes in each direction, I-115 heads east into downtown [[Butte, Montana|Butte]]. Before reaching exit&nbsp;1, eastbound traffic makes a curve while westbound traffic goes to I-15/I-90 without making such a curve, therefore, that portion of I-115 contains a large median. Approximately {{convert|1|mi|spell=in}} from I-15/I-90, I-115 has its only interchange at Excelsior Avenue, which can be used to access the town of [[Walkerville, Montana|Walkerville]]. Excelsior Avenue is the only numbered exit along I-115, and the structure of the interchange directs motorists to stop and yield signs, as opposed to [[Traffic light|traffic signals]] for most exits in urban areas. I-115 ends at the overpass over Excelsior Avenue. It continues into [[Butte, Montana|Butte]] as [[Interstate 15 Business (Butte, Montana)|I-15 Bus.]]/[[Interstate 90 Business (Butte, Montana)|I-90 Bus]].<ref name="Google Maps">{{Google maps|url=https://maps.google.com/maps?saddr=Exit+124&daddr=W+Iron+St&hl=en&ll=46.000539,-112.556906&spn=0.035952,0.055189&sll=46.004057,-112.5524&sspn=0.018094,0.027595&geocode=FY_4vQIda0RK-Q%3BFfX1vQIdVa9K-Q&mra=mrv&t=h&z=14|accessdate=December 20, 2013}}</ref>


==History==
==History==
[[File:Butte, Montana 1955 Yellow Book.jpg|right|thumb|Planning map for the Butte area freeways from 1955|alt=Map]]
[[File:Butte, Montana 1955 Yellow Book.jpg|right|thumb|Planning map for the Butte area freeways from 1955|alt=Map]]
The development of a freeway along the modern-day I-115 corridor was proposed in the 1950s. The 1955 ''[[General Location of National System of Interstate Highways]]'', an early platform for what would become the Interstate Highway System, contained an inset of the proposed freeways in and around the city of Butte including an east-west freeway spur on the west side of the community.<ref name="YBGR">{{cite map |url=https://archive.org/stream/generallocationo00unitrich#page/50/mode/2up |title=General Location of National System of Interstate Highways Including All Additional Routes at Urban Areas Designated in September 1955 |map=Butte, Montana |page= 51 |scale= 1&nbsp;inch=1&nbsp;mile |cartography= BPR |publisher= Bureau of Public Roads |date=September 1955 |oclc= 4165975}}</ref> Designated as part of the [[Interstate Highway System]] around 1957, I-115's construction was funded by the federal government.<ref name=FHWA>{{cite web |first= Tony |last= DeSimone |date= October 31, 2002 |url= http://www.fhwa.dot.gov/reports/routefinder/table2.htm |title=Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002 |work= Route Log and Finder List |publisher= Federal Highway Administration |accessdate= December 20, 2013 |oclc= 47914009}}</ref>{{#tag:ref|I-115 was constructed and included in the Interstate Highway System before 1978. The Surface Transportation Assistance Act of 1978 provided that all Interstate construction authorized under previous amendments to the system would be funded by the federal government but additional highway mileage added under {{usc|23|103(c)(4)(A)}} would not be supported by the same allocation of funds.<ref>{{cite conference |author= United States Congress |authorlink= United States Congress |year= 1978 |title= Surface Transportation Assistance Act of 1978 |id= {{USPL|99|599}} }}</ref><ref name="FHWA2">{{cite web |first= Tony |last= DeSimone |date= June 4, 2012 |url= http://www.fhwa.dot.gov/reports/routefinder/#s05 |work= Route Log and Finder List |title= Expansion of Mileage |publisher=Federal Highway Administration |accessdate= December 20, 2013 |oclc= 47914009}}</ref>|group=lower-alpha}}
The development of a freeway along the modern-day I-115 corridor was proposed in the 1950s. The 1955 ''[[General Location of National System of Interstate Highways]]'', an early platform for what would become the Interstate Highway System, contained an inset of the proposed freeways in and around the city of Butte including an east–west freeway spur on the west side of the community.<ref name="YBGR">{{cite map |map-url=https://archive.org/stream/generallocationo00unitrich#page/50/mode/2up |title=General Location of National System of Interstate Highways Including All Additional Routes at Urban Areas Designated in September 1955 |map=Butte, Montana |page= 51 |scale= 1:63,360 |author= Bureau of Public Roads |publisher= Bureau of Public Roads |date=September 1955 |oclc= 4165975}}</ref> Designated as part of the [[Interstate Highway System]] around 1957, I-115's construction was funded by the federal government.<ref name=FHWA>{{cite web |first= Tony |last= DeSimone |date= October 31, 2002 |url= http://www.fhwa.dot.gov/reports/routefinder/table2.htm |title=Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002 |work= Route Log and Finder List |publisher= Federal Highway Administration |accessdate= December 20, 2013 |oclc= 47914009}}</ref>{{#tag:ref|I-115 was constructed and included in the Interstate Highway System before 1978. The Surface Transportation Assistance Act of 1978 provided that all Interstate construction authorized under previous amendments to the system would be funded by the federal government but additional highway mileage added under {{usc|23|103(c)(4)(A)}} would not be supported by the same allocation of funds.<ref>{{cite conference |author= United States Congress |authorlink= United States Congress |year= 1978 |title= Surface Transportation Assistance Act of 1978 |id= {{USPL|99|599}} }}</ref><ref name="FHWA2">{{cite web |first= Tony |last= DeSimone |date= June 4, 2012 |url= http://www.fhwa.dot.gov/reports/routefinder/#s05 |work= Route Log and Finder List |title= Expansion of Mileage |publisher=Federal Highway Administration |accessdate= December 20, 2013 |oclc= 47914009}}</ref>|group=lower-alpha}}


==Exit list==
==Exit list==
{{Jcttop|exit|state=MT|county=Silver Bow|length_ref=<ref name="log">{{cite report|author=Staff|publisher=[[Montana Department of Transportation]] |url=http://www.mdt.mt.gov/publications/docs/brochures/2011_roadlog.pdf |format=PDF|title=Montana Road Log|year=2011 |edition=2011 |accessdate=December 21, 2013}}</ref>}}
{{Jcttop|exit|state=MT|county=Silver Bow|location=Butte|length_ref=<ref name="log">{{cite report|author=Montana Department of Transportation|publisher=Montana Department of Transportation|author-link = Montana Department of Transportation |url=http://www.mdt.mt.gov/publications/docs/brochures/2011_roadlog.pdf |format=PDF|title=Montana Road Log|year=2011 |edition=2011 |accessdate=December 21, 2013}}</ref>}}
{{MTint|exit
{{MTint|exit|type=incomplete|location=none|mile=0.000|exit=—|road={{Jct|state=MT|I|15|dir1=South|I|90|dir2=West}}|notes=Exit 124 on I-15/90; westbound exit and eastbound entrance only.}}
|type=incomplete
⚫
{{MTint|exit|location=Butte|lspan=2|mile=1.194|exit=1|road=Excelsior Avenue&nbsp;– [[Walkerville, Montana|Walkerville]]}}
|mile=0.000
⚫
{{MTint|exit|exit=—|mile=1.194|road={{Jct|state=MT|BL|15|dab1=Butte|dir1=North|BL|90|dab2=Butte|dir2=East}}|notes=Continuation beyond Excelsior Avenue}}
|exit=
|road={{Jct|state=MT|I|15|dir1=South|I|90|dir2=West|BL|15|dir3=begins|BL|90|dir4=begins|dab3=Butte|dab4=Butte|city1=Billings|city2=Helena|location3=[[Idaho Falls, Idaho|Idaho Falls]]|city4=Missoula}}
|notes=Exit 124 on I-15/I-90; no access to I-15 north/I-90 east}}
{{MTint|exit
|mile=1.194
|mspan=2
|exit=1
⚫
|road=Excelsior Avenue&nbsp;– [[Walkerville, Montana|Walkerville]]}}
{{MTint|exit
|exit=
|mile=none
⚫
|road={{Jct|state=MT|BL|15|dab1=Butte|dir1=North|BL|90|dab2=Butte|dir2=East|name2=Iron Street}}
|notes=Continuation beyond Excelsior Avenue}}
{{Jctbtm|keys=incomplete}}
{{Jctbtm|keys=incomplete}}


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[[Category:Interstate Highways in Montana]]
[[Category:Interstate Highways in Montana]]
[[Category:Interstate 15]]
[[Category:Interstate 15]]
[[Category:Transportation in Silver Bow County, Montana]]
[[Category:Butte, Montana]]

Latest revision as of 19:46, 23 January 2024

"I-115" redirects here. For the isotope of iodine (I-115 or 115I), see Iodine-115.

Interstate 115 marker

Interstate 115

Map
I-115 highlighted in red
Route information
Auxiliary route of I-15
Maintained by MDT
Length1.194 mi (1.922 km)
Existed1971–present
NHSEntire route
Major junctions
West end I-15 / I-90 in Butte
East end I-15 BL / I-90 BL in Butte
Location
CountryUnited States
StateMontana
CountiesSilver Bow
Highway system
← I-94→ MT 117

Interstate 115 (I-115) is a 1.194-mile-long (1.922 km) auxiliary Interstate Highway which connects I-15/I-90 to Butte in the U.S. state of Montana. The highway is concurrent with I-15 Bus./I-90 Bus. for its entire length. The highway travels from an incomplete interchange with I-15/I-90 through generally rural areas in western Butte. It also has an interchange with Excelsior Avenue before terminating. The entire route was improved to Interstate standards during the 1960s, and was further improved in 2005.

Route description[edit]

I-115 begins at an interchange with I-15/I-90. As a four-lane highway with two lanes in each direction, I-115 heads east into downtown Butte. Before reaching exit 1, eastbound traffic makes a curve while westbound traffic goes to I-15/I-90 without making such a curve, therefore, that portion of I-115 contains a large median. Approximately one mile (1.6 km) from I-15/I-90, I-115 has its only interchange at Excelsior Avenue, which can be used to access the town of Walkerville. Excelsior Avenue is the only numbered exit along I-115, and the structure of the interchange directs motorists to stop and yield signs, as opposed to traffic signals for most exits in urban areas. I-115 ends at the overpass over Excelsior Avenue. It continues into Butte as I-15 Bus./I-90 Bus.[1]

History[edit]

Map
Planning map for the Butte area freeways from 1955

The development of a freeway along the modern-day I-115 corridor was proposed in the 1950s. The 1955 General Location of National System of Interstate Highways, an early platform for what would become the Interstate Highway System, contained an inset of the proposed freeways in and around the city of Butte including an east–west freeway spur on the west side of the community.[2] Designated as part of the Interstate Highway System around 1957, I-115's construction was funded by the federal government.[3][a]

Exit list[edit]

The entire route is in Butte, Silver Bow County.

mi[6]kmExitDestinationsNotes
0.0000.000



 I-15 south / I-90 west / I-15 BL begins / I-90 BL begins – Billings, Helena, Idaho Falls, Missoula		Exit 124 on I-15/I-90; no access to I-15 north/I-90 east
1.1941.9221Excelsior Avenue – Walkerville


 I-15 BL north / I-90 BL east (Iron Street)		Continuation beyond Excelsior Avenue
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References[edit]

Footnotes[edit]

  1. ^ I-115 was constructed and included in the Interstate Highway System before 1978. The Surface Transportation Assistance Act of 1978 provided that all Interstate construction authorized under previous amendments to the system would be funded by the federal government but additional highway mileage added under 23 U.S.C. § 103(c)(4)(A) would not be supported by the same allocation of funds.[4][5]

References[edit]

  1. ^ Google (December 20, 2013). "Interstate 115" (Map). Google Maps. Google. Retrieved December 20, 2013.
  2. ^ Bureau of Public Roads (September 1955). "Butte, Montana" (Map). General Location of National System of Interstate Highways Including All Additional Routes at Urban Areas Designated in September 1955. 1:63,360. Bureau of Public Roads. p. 51. OCLC 4165975.
  3. ^ DeSimone, Tony (October 31, 2002). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Retrieved December 20, 2013.
  4. ^ United States Congress (1978). Surface Transportation Assistance Act of 1978. Pub. L.Tooltip Public Law (United States) 99–599.
  5. ^ DeSimone, Tony (June 4, 2012). "Expansion of Mileage". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Retrieved December 20, 2013.
  6. ^ Montana Department of Transportation (2011). Montana Road Log (PDF) (Report) (2011 ed.). Montana Department of Transportation. Retrieved December 21, 2013.

External links[edit]

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Template:Attached KML/Interstate 115
KML is from Wikidata
Retrieved from "https://en.wikipedia.org/w/index.php?title=Interstate_115&oldid=1198309887"