the DB-400 hand-held
device to collect all manual traffic data studies: intersection turning
The DB-400 is designed to make collecting turning movement data easy
and accurate. The buttons are arranged to simulate a standard
intersection. There are 16 buttons, with 12 normally used for the left,
through, and right movements from each of the four approach directions.
The additional four buttons are user-defined; they can be used for
bicycles, pedestrians, or whatever you want.
Since the DB-400 looks like an intersection, doing a count is very
intuitive. If a car makes a left turn from an approach, you simply push
the button that shows a left turn from that direction. The DB-400 keeps
track of everything else for you. At the end of every time interval,
the data is automatically stored, so there is no need for technicians
to take their eyes off the intersection to write down numbers.
While you record turning movements, you also have the option to
classify the vehicles recorded in up to three separate classes using
the DB-400's 'Bank' buttons. Trucks and other heavy vehicles can be
stored separate from passenger vehicles, and percentage breakdowns can
Multiple studies can be stored in the DB-400, using up to a total of
312 intervals of data. For each count, the unit stores the date and
time, the number of intervals used, a site code, and the data.
At any convenient time, you can transfer the data to your computer
through the serial port to our PETRAPro software. The
PETRAPro software allows you to easily read, edit and store the data,
as well as print a variety of reports and graphs, without ever having
to manually enter data.