What is the National Hazardous Materials Route Registry?
The NHMRR is the national repository of both non-radioactive hazardous
materials (NRHM) and Radioactive (RAM) routes which are either designated for the hazmat transportation
or restricted from use by hazmat carriers. The primary means of identifying and storing a
particular route in the registry is through a textual description of the route which is
stored in a database. This information was collected from each State, Territory, and
Indian Tribe that has assigned a routing agency. A routing agency is designated by
the Governor or Indian Tribe official and is responsible to supervise, coordinate, and
approve all NRHM routing designations and restrictions prescribed by state, county, local
or other governing body within the State, Territory, or Indian Tribe lands.
Presently, there are still a few States, Territories, and Indian Tribes that have not yet
assigned a routing agency; therefore, reporting for these entities is not complete.
Each route description within the registry contains the
street, highway, bridge, or tunnel upon which the route is based and may contain two
intersecting streets or highways (terminators) that define the starting and ending points
of the route along the route. The route description may also include descriptors and
notes [found within brackets] which will further describe the route or the intersecting
roads which define it. The description will contain the route origination date, the
date in which the route first went into effect, and the last update date, the date in
which changes to the route were last logged in the route registry database. The last
update date currently does not appear in the web route report output; however, you can
select records on the query form based on this data field. This is useful to find routes
that have been updated or changed in the registry since a particular date.
The route description will also include tags that
identify what type of material is designated for transportation or restricted from use on
the route. These tags can be decoded using the following Restriction/Designation
key.
Restriction / Designation Key
Restrictions(Prohibited for the indicated hazmat) |
Designations(Recommended for indicated hazmat) |
0 - All Hazmats
1 - Class 1 - Explosives
2 - Class 2 - Gas
3 - Class 3 - Flammable
4 - Class 4 - Flammable solid/Combustible
5 - Class 5 - Organic
6 - Class 6 - Poison
7 - Class 7 - Radioactive
8 - Class 8 - Corrosives
9 - Other
i - Poisonous Inhalation Hazard (PIH)
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A - All NRHM Hazmats
B - Class 1 - Explosives
I - Poisonous Inhalation Hazard (PIH)
M - Medical Waste
P - Preferred Radioactive Route
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Hazardous Materials Highway Routing Legislation and Rules
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Guidelines for Selecting Preferred Highway
Route Controlled Quantity Shipments of Radioactive Materials (RSPA-HMS-92-02)
A comprehensive 109 page document has been
compiled which describes in technical detail the federal guidelines for selecting highway route
controlled quantities (HRCQ) of radioactive materials. This document was authored by the
Research and Special Programs Administration (RSPA) and
describes the quantitative techniques to be employed to calculate a risk assessment of a
proposed or existing radioactive material (RAM) route to determine its compliance. These
techniques factor in radioactive dispersion, weather, population density, type of highway,
emergency response capabilities, terrain/environmental factors, accident statistics, and other parameters.
Now available online in PDF format -
Download (7.3 Mb)
Guidelines for Applying Criteria to
Designate Hazmat Routes (FHWA-SA-94-083)
A comprehensive 131 page document has been
compiled which describes in technical detail the federal guidelines which States,
Territories, and Indian Tribes must follow when designating non-radioactive hazardous material (NRHM)
routes. This document was authored by the Federal Highway Administration (FHWA) and
describes the quantitative techniques to be employed to calculate a risk assessment of a
proposed or existing hazardous material route to determine its compliance. These
techniques factor in population density, type of highway, emergency response capabilities,
terrain/environmental factors, accident statistics, and other parameters. This guide was revised in 1996
by the National Highway Institute by the document entitled "Highway Routing of Hazardous Materials: Guidelines
for Applying Criteria" FHWA-HI-97-004, NHI Course No. 38064.
Now available online in PDF format -
Download (14.3 Mb)
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