U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Public Road Mileage Data
Public road mileage data are reported to the Federal Highway Administration (FHWA) on an annual basis by State governors or their designees per 23 CFR 460. For a given State, the certification is reported as a single number inclusive of all public road functional classifications and types plus public roads on Indian reservations where applicable. Over the years, the FHWA has practiced a wide variety of ways and methods to preform data quality evaluation with the goal and objective of ensuring that all States are treated equally and fairly with regard to various Federal-aid highway programs. Methods used in the data quality review include historical data analysis, decomposing various roadway functional classifications and types based on the Highway Performance Monitoring System (HPMS), and readily available State highway agency information.
The latest Federal surface transportation legislation (MAP-21) prescribes that the Highway Safety Improvement Program for each State shall establish a safety data system covering all public roads, including non-State-owned public roads and roads on tribal land in the State in a geospatial manner. In other words, State highway agencies will have a geospatially enabled public roadway network or base map. The FHWA is asking all State highway agencies to submit such network as either part of the HPMS submittal or the certified public road mileage submittal to facilitate FHWA's review and acceptance of the certified road data. The geospatial network will enable FHWA's review and acceptance of the certified public roadway mileage information in a timelier manner and with greater accuracy, efficiency and precision.
While the FHWA is expecting that a geospatial public roadway network contains no fewer roadways than what a State governor currently certifies, the FHWA also realizes that the expanded public roadway geospatial network will provide the State additional tools leveraging new information about the States' public roadway data which may result substantial changes to what States have been reporting historically. If substantial differences are discovered, the States shall document the causes for the discrepancies. The FHWA is not planning to retroactively reassess Federal-aid fund already allocated or apportioned to States. The new information is simply to be used for future Federal-aid programs.
FHWA relies on State highway agencies to implement 23CFR460 in terms of public road identification and reporting. State highway agencies shall work with all public entities in identifying and classifying roadways per 23CFR460 through local knowledge and procedures. Consistency between the certified mileage and States' public road network data shall be observed and practiced.
What is ARNOLD?
FHWA's internal name for the All Roads Network Of Linear referenced Data.
What is the relationship between the Certified Public Road Mileage and ARNOLD?
The Certified Public Road Mileage will support the development of ARNOLD.
I did not receive the memo, what are you talking about?
On August 7, 2012, FHWA issued a requirement for States to provide an extensive coverage of a Geospatial Network of all highways in their State. Memo
As Clarification: State DOTs are required to provide an LRS Network for All Public Non Federal Owned Highways only. The FHWA will work with the Federal Agencies to provide information on Federal Owned Highways.
What is the background behind the requirement for a state to provide a geospatial network of all public roads in their State?
The spirit behind Arnold came from the National States Geographic Information Council (NSGIC) through the Transportation for the Nation (TFTN) initiative. It has long been recognized that a complete highway network was lacking in the US. The Strategic Plan that was created from TFTN identified the Highway Performance Monitoring System (HPMS) as the current best hope to accomplish a successful development of the initiative.
What are the specific requirements does this network support?
Who does FHWA recognize has having that authority for transportation data?
In a federal system, each State has primary authority over all public non-federal highways in their State so FHWA looks to each State DOT as the authority for information about roads in their State. For example, there is an annual certification of centerline miles by each governor or designee. A State DOT may pass this authority to another entity (a private sector vendor, local government, State GIO etc.) but the FHWA recognizes each States DOT as the final Authority.
The FHWA Federal Lands Division has identified each Federal Agency owner as the authority on roads owned by that agency.
What is the Network Specification?
Through the next several months, FHWA will lead an effort to reach a consensus as to the final specification of Arnold. Most elements are straightforward but the devil is in the details.
|Scope||All States, US Territories, District of Columbia|
|Extent||All Public Highways including Ramps and Frontage Roads TODO: Expand on this definition.|
|Authority||Federal Highways — Federal Agency Owner|
|Non-Federal Highways - State DOT|
|Directionality||Dual Carriageway Representation|
|Defined as Positive Barrier Median or Median width of 4/ or greater.|
|Linear Reference||Begin and End Calibration accurate to .001 mile|
|Geodetic Datum||The network will be stored in WGS 84|
|Geospatial Accuracy||1:24,000 or better|
|Unit of Measure||Miles|
Open Geospatial Consortium (OGC): Simple Feature Specification
What should be identified in the plan?
What HPMS section data items are required on the Non Federal Aid and Non Inventory direction facilities in ARNOLD?
States should follow the requirements identified in the HPMS Field Manual regarding the extent for reporting data.
There is no requirement for a State to provide HPMS section data items on facilities functionally classified as Local or Rural Minor Collector other than highways designated as National Highway System. Currently there is no requirement for a State to provide additional HPMS data items for the non inventory direction.
Metadata for ARNOLD?
Metadata should follow the ISO FGDC ISO metadata standard.
Is a State DOT required to provide addresses or address ranges?
The TFTN calls for the ability to support addressing. FHWA is partnering with the US Census Bureau to capitolize on the hard work to produce the TIGER Line.
Although there is no requirement for a State to report address or address ranges in HPMS, it is anticipated that ARNOLD will be capable of supporting address data.
What is the Future of the National Highway Planning Network(NHPN)?
The NHPN uses HPMS as a source as part of a planning product. It is taylored to the upper level functional classified roads. The NHPN has some value added elements (i.e routing across state boundaries) and may include other data that has not been provided by State DOTs. Since NHPN is mostly a product, it is anticipated that it will continue to fulfill that role for its many customers.
Questions from February 13, 2013 Webinar
Is the State Match waiver for all of ARNOLD, or just to develop the plan?
The SPR State Match Waiver is for any work in the planning or implementing ARNOLD.
Has the FGDC Metadata Standard already been decided or are there other considerations like the ISO Metadata Standard?
FHWA recognizes the need for metadata. An evaluation of which standard should adopted is still pending.
What about states that use proprietary map datasets (e.g. NavTeq)? If the state's network is based on proprietary data, can it be submitted - can licensing restrictions be respected?
We are engaged in dialogs with both Nokia/NavTeq and TomTom about the use of their data in the public sector. Both vendors have indicated a desire to make this project successful.
Can you distinguish trail from road?
23USC101 (21) Public road. - The term "public road" means any road or street under the jurisdiction of and maintained by a public authority and open to public travel. 23 USC206 (2) Recreational trail. - The term "recreational trail" means a thoroughfare or track across land or snow, used for recreational purposes such as -(A) pedestrian activities, including wheelchair use; (B) skating or skateboarding; (C) equestrian activities, including carriage driving; (D) nonmotorized snow trail activities, including skiing; (E) bicycling or use of other human-powered vehicles; (F) aquatic or water activities; and (G) motorized vehicular activities, including all-terrain vehicle riding, motorcycling, snowmobiling, use of off-road light trucks, or use of other off-road motorized vehicles.
Will mike neathery use this network? i keep on getting different network issues from his shop...is he using battelle, ornl or some other obscure network that's not coordinated w/ hpms?
It is anticipated that the NHS will be recorded and maintained on ARNOLD. Arnold will become a source for the Nation Highway Planning Network of with the official National Highway System is designated.
Road mileage would be capacity lanes only? Do you expect us to double our milage with divided roads?
Certified Public Mileage should be based on Capacity Lanes in the inventory direction or centerline
You mentioned some topology rules, what are you thinking about for topology rules?
These rules are pending.
Will you be addressing the difficulty of collecting median types for dual carriageways. This data is only collected on sample sections
We will be assembling a list of challenges that need to be addressed.
Will all attributes be required for reporting on the dual carriageways or only on centerline as is now.
When will BLM be considered public? Does BLM follow 23USC101 (21)?
FHWA has a partnership with BLM through the Federal Lands Division. FHL will be responsible for these roads.
Since we get fed miles from you (FHWA) will we also get their LRS from you all as well?
We anticipate that FHL would be responsible for these roads.
Then we don't have to ask Fed agencies for their mileage each year anymore?
This part of the vision however the current practice still exists until this is worked out.
How will the dual carriage ways be distinguished from the mainline in the route feature class?
We distinguish these roads from the mainline using the FACILTY_TYPE data item, this attribute may be required on all roads. There will need to be a discussion regarding this issue.
Is there a rough timeline when the pooled fund study will begin and is it a 2 or 3 year project timeline?
When will you have guidance about samples on federal lands?
Are BIA and Indian Nation roads considered non-federal?
For the purpose of ARNOLD, FHL will be responsible for BIA and Indian Nation Highways.
How are states expected to have the LRS completed if it is going to take several years for the pooled fund study and research tobe completed?
This will be a major effort in NYS. Our SPR money is fully commited to other projects. We are hearing total SPR funding is reduced under MAP-21. Can you confirm?
CDOT: What if there is no way that we can meet all requirements by 2014? When will punative measures start being enacted?
I don't know what punitive measures you are talking about.
Does BLM follow 23USC101 (21) ?
Can we submit all of our public roads this year to see if acceptable?
HPMS Software a set up the handle ingesting the new requirements.
which states are submitting all roads including locals for hpms currently?
Ann Austin - VIrginia DOT: quick question on the revised NHS (Map 21)- when will it be required to be reported in our submittals? 2012 or 2013 submittal???
Are there going to be Sessions on this at GIS_T?
FHWA will be giving a workshop on Sunday May 5,2013 and other presentations during GIS-T in Boise,Idaho.
ALDOT: Per FMIS, are DOT's still required to have roads projects are on within the HPMS Routes? Is there a grace period?
FMIS has made a requirement to submit an LRS and Linework for Federal Aid Projects. The contingencies are still in work for States that are unable to meet the deadline of October, 2014.