OpenHistoricalMap/Projects/Interstate Highway System

thisOpenHistoricalMap is building coverage of the Interstate Highway System as a stepping stone to more comprehensive coverage of highways in the United States.

Tagging

This section describes the standardization desired for this project. Listed below is a minimal set of tags. Additional tags can be added, as appropriate, but mappers should feel comfortable moving on if these have been included as a first pass.

Ways

tag	notes	example
name=*	name, if it has one	Northeast Expressway
highway=construction	for the time during which a road is either under construction or complete, but not yet open.
highway=motorway	this should be true for most Interstate highways
highway=trunk	only use this for the handful of non-freeway segments within the Interstate network. also include: highway:source=https://en.wikipedia.org/wiki/List_of_gaps_in_Interstate_Highways#Freeway_gaps
source=*	the URL where you obtained the geometry	https://connect.ncdot.gov/resources/gis/Pages/GIS-Data-Layers.aspx
start_date=*	start date in ISO 8601 YYYY-MM-DD format	1974-10-22 1962-12 1979
start_date:edtf=*	used when the start date is uncertain; can also be used for times	1974-10-22T15:00 1962-12-XX [..1979]
start_date:source=*	the URL where you obtained the start date
validated=*	FEEDBACK NEEDED: is this necessary & if so, is there a better key? (validate? reviewed?) how do we ensure that all road segments are marked for review? should we add this to relations?

OPTIONAL Way Tags

tag	notes	example
ref=*	this is not used by any automated processing, rendering, or search. route membership should be reflected in relation membership, not ref=* tagging	I-71
expressway=yes	use with care and only if you are certain and can link to justification. link to the justification with expressway:source=<url to explanation>
oneway=yes	this is assumed on road segments tagged highway=motorway

Relations

When should segments be added to an Interstate route relation?

• Not until they have been designated to be part of the Interstate

When should relations be created?

• For each direction, for each segment, for each time period. For example, I-95 N in NC, I-70 W in CO.
• You can then group both directions into an I-95 in North Carolina relation or an I-70 in Colorado.

FEEDBACK NEEDED: When should chronology relations be created?

• This may depend on how the underlying road topology changes. This is particularly true for repurposed portions of road, where little new construction has occurred.

FEEDBACK NEEDED: How should links to AARoads be managed? It seems like we should leverage AARoads as much as possible and standardize our tagging connections throughout this project. Should we link to their wiki pages or their more polished, user-facing pages, or both? Should we use `more_info:#=*` links?

tag	notes	example
type=route	-
route=road	-
network=US:I	-
ref=*	put the number of the Interstate, without the "I-" prefix; NOTE: this is different from the treatment of ref=* on ways
wikidata=*	use the data item Q-code for the article that most closely matches the segment being mapped. For example, if mapping I-40 in North Carolina, link to that data item and not the generic data item for I-40.	Q94967
wikipedia=*	en:<article name with spaces>	en:Interstate 95
name=*	FEEDBACK NEEDED: do we need these; are they optional where people would like to name them; this is different from named highways, but where should those be named? OSM sometimes uses description=* for this purpose (see: 2297413 2297413), but I (jeffmeyer) feel using name=* provides a better user experience in search results.	I-95 in NC
start_date=*	Put the start date of the earliest segment constructed that is part of the relation (e.g. I-95 in NC)
members	Please sort your relation members so they represent a continuous line.

Changesets

FEEDBACK NEEDED: should we have a project-wide changeset hashtag? e.g. #ushighways

Taginfo Project

HELP NEEDED: his is a big project, so it may be heapful to create a TagInfo project page & project file (TagInfo project file documentation).

Progress

Use this table to document the buildout of the Interstate Highway System as it replaced older roads and connected the country

Highway	State	Contributor	Status	Current Region	Current Time Period	Relation	Concurrent projects
I-2	TX
I-4	FL
I-5	CA
	OR
	WA
I-8	AZ
	CA
I-10	AL
	AZ
	CA
	FL
	LA
	MS
	NM
	TX
I-11	NV
I-12	LA
I-14	TX
I-15	AZ
	CA
	ID
	MT
	NV
	UT
I-16	GA
I-17	AZ
I-19	AZ
I-20	AL
	GA
	LA
	MS
	SC
	TX
I-22	AL
	MS
I-24	GA
	IL
	KY
	TN
I-25	CO
	NM
	WY
I-26	NC
	SC
	TN
I-27	TX
I-29	IA
	MO
	ND
	SD
I-30	AR
	TX
I-35	IA
	KS
	MN
	MO
	OK	okiewxchaser (on osm) (on OHM)	Relation Needed				US-77
	TX
I-37	TX
I-39	IL
	WI
I-40	AR
	AZ
	CA
	NC
	NM
	OK	okiewxchaser (on osm) (on OHM)	Relation Needed				US-62, US-64, US-66
	TN
	TX	okiewxchaser (on osm) (on OHM)	Research	Panhandle	1959-Present		US-66
I-43	WI
I-44	MO
	OK	okiewxchaser (on osm) (on OHM)	Relation Needed				US-66
	TX
I-45	TX
I-49	AR
	LA
	MO
I-55	AR
	IL
	LA
	MO
	MS
	TN
I-57	IL
	MO
I-59	AL
	GA
	LA
	MS
I-64	IL
	IN
	KY
	MO
	VA
	WV
I-65	AL
	IN
	KY
	TN
I-66	DC
	VA
I-68	MD
	WV
I-69	IN
	KY
	MI
	MS
	TX
I-70	CO	GeoDave5280 (on osm) (on OHM)				I-70 in Colorado
	IL
	IN
	KS
	MD
	MO
	OH
	PA
	UT
	WV
I-71	KY
	OH	Minh Nguyễn (Minh Nguyen on osm) (on OHM)	10%		From inception	2807483	Cross County Highway/SR 126
I-72	IL
	MO
I-73	NC
I-74	IA
	IL
	IN		5%
	NC
	OH	Minh Nguyễn (Minh Nguyen on osm) (on OHM)	100%		From inception	2808106	US 52
I-75	FL
	GA
	KY
	MI
	OH	Minh Nguyễn (Minh Nguyen on osm) (on OHM)	15%		From inception		I-275
	TN
I-76	CO
	NE
I-76	NJ
	OH
	PA
I-77	NC
	OH
	SC
	VA
	WV
I-78	NJ
	NY
	PA
I-79	PA
	VA
I-80	CA
	IA
	IL
	IN
	NE
	NJ
	NV
	OH
	PA
	UT
	WY
I-81	MD
	NY
	PA
	TN
	VA
	WV
I-82	OR
	WA
I-83	MD
	PA
I-84	CT
	ID
	MA
	NY
	OR
	PA
	UT
I-85	AL
	GA
	NC
	SC
	VA
I-86	ID
	NY
	PA
I-87	NC
	NY
I-89	NH
	VT
I-90	ID
	IL
	IN
	MA
	MN
	MT
	NY
	OH
	PA
	SD
	WA
	WI
	WY
I-91	MA
	NH
	VT
I-93	MA
	NH
	VT
I-94	IL
	IN
	MI
	MN
	MT
	ND
	WI
I-95	CT
	DC
	DE
	FL
	GA
	MA
	MD
	ME
	NC	jeffmeyer (on osm) (on OHM)	current I-95 in NC with rough segment construction dates added; needs stretch date segments validated w/newspaper articles; geometry aligned to period-specific connections; more detailed sourcing	statewide	construction/dedication (1958)-present	I-95 in NC	US 301 in NC; status: initial/current geometery set up
	NH
	NJ
	NY
	PA
	RI
	SC
	VA
I-96	MI
I-97	MD
I-99	NY
	PA

See also

• Interstate Highways