It facilitates quick location of information in the following areas: motor vehicle registration, driver licensing, highway, accident, financial responsibility, motor vehicle inspection, commercial vehicle reciprocity, traffic law enforcement, and emergency medical services. For each data element included, the following information is maintained: name, short name, abbreviation, definition, sources, uses, type of data element (basic or composite), type of representation (name, abbreviation, code, numeric value), type of character(s) (numeric, alphanumeric, alphabetic, special), length (fixed or variable and number of characters), synonym(s), other characteristics, and descriptions of data items (name of item, abbreviation, code, definition). Provision is made for cross-referencing and for indications of units of measurement. A key word index and a glossary are also provided. By applying the data representations in the dictionary, users can monitor the application, expiration, and renewal of driver licenses and vehicle registrations; determine compliance with financial responsibility and vehicle inspection requirements; estimate emergency medical and traffic law enforcement capability; determine the traffic accident problem of a jurisdiction; monitor traffic violations through the adjudication process; calculate revenues; and plan for highway construction and design improvements. An additional listing of data elements is included.