User`s manual

TDC Ultra User’s Manual
5-2
Classification Studies
The TDC Ultra allows you to do many different types of classification stud-
ies. Technically, both the Turning Movement studies and the Gap studies are
classification studies. In one, the classes are the number of vehicles making
specific movements, and in the other the classes are time intervals between
vehicles. In the TDC Ultra these studies are given special treatment to make
them simpler to do, but they still are essentially classification studies.
The normal use of the term Classification Study involves a manual survey
of the types of vehicles. Each class is a particular type of vehicle, either
a passenger car, a bus, a type of truck, etc. The study, typically called a
Manual Classification Study, involves counting the number of vehicles of
each class for a given amount of time.