The denominator for safety exposure calculations (e.g., fatalities
per million ___)
Drivers age/gender correlation to crash rates
Vehicle fleet fuel efficiency
Miles of travel per vehicle
How the Data is Used
Input to other agencies:
National Highway Traffic Safety Administration
National Transportation Safety
Board
Energy Information Agency
Environment Protection Agency
Bureau of Labor Statistics
Federal Bureau of Investigations
Bureau of Transportation Statistics
Government Accountability Office
Data Users
Congress
Government Agencies:
Federal
State
County
Municipal
Private sector/business
Educational institutions
Libraries
Students
Citizens
Other countries
Motor Vehicle Registrations (Forms FHWA-561, 566 and 571)
State provided data
Number of vehicles registered for highway use:
By vehicle type:
Automobiles
Buses
Trucks
Motorcycles
Revenue generated from registration fees
Standard measure of vehicles licensed for use on the highways
Typical Procedures
States report annually
Data is:
Reviewed
Analyzed
Adjusted for specific State limitations
Refined into more detailed categories
Readied for publication
Published
Series of Tables in Highway Statistics
Provided to other agencies for further
uses
Analysis
Adjustments:
Definitions – One of the major obstacles in compiling accurate
vehicle registration data is inconsistent vehicle registration. Different
States have different parameters in the definitions which lead to irregularities
among categories. For example, some States register light trucks by weight
rather than by type.
Re-registrations – Vehicle re-registration in different
States as a change in ownership are hard to tract. A problem compounded
by varying registration cycles among States.
Multi-Year Registrations – Registration
cycles are different. Example: 1 year cycle vs. a 4 year cycle.
Estimates
Buses – Most commercial businesses will register buses in the State
the company is headquartered but the buses are operated in another State.
Truck
Tractors – Estimates are made on a State-by-State basis. TT counts
are based on Vehicle Inventory and Use Survey (VIUS).
Trailers – Most States only report total trailers. Need breakdown
(Commercial, House, and Small).
State, County, and Municipal Vehicles – Only total reported by
State.
Light Trucks – Only total reported by State. Need breakdown (pickups,
vans, sport utility vehicles and other light vehicles)
Incomplete and/or Missing Data – Self-explanatory
Drivers License Data
Form FHWA-562
State provided data
Number of drivers licenses issued by:
Gender
Age
Revenue generated from license fees
Standard measure of citizens with driving privileges
INSTRUCTIONS FOR FORM FHWA- 562
Other kinds of permits and or licenses to be included are learner permits,
licenses issued solely for the operation of motorcycles, scooters, or mopeds.
States
have some form of graduated licensing for teenage drivers.
Thus, to improve
driver licenses data quality the definition of "teenage driver" changed.
Less
than 19 States provided the data for graduated licenses for teenage drivers
for 2009.
Therefore, there well may be approximately over 8 million 14- and
15-year olds not accounted for.
Form FHWA-562
Incomplete Age Groups
23 Years and 24 Years – 1 State
75 years and over – 2 States
80 years and over – 2 States
85 years and over – 1 State
Therefore, FHWA must estimate by redistributing
State's reported data based on the Census population.