Availability
Availability means the degree to which data values are present in the attributes (e.g., speed and travel time are attributes of traffic) that require them. Availability is typically described in terms of percentages or number of data values.
Source
23 CFR § 511.303
Scoping language
Unless otherwise specified in this part, the definitions in 23 U.S.C. 101 are applicable to this subpart. As used in this part: