User`s manual

6-5
The template for the study (shown on page 5-2) shows that keys 11 and
12 are used to count the approach vehicles. The study is started when you
press one of these keys. Each vehicle is counted (as described before)
as either stopping or stopped (press STOPPED) or not stopping (press
THROUGH). Remember, count each vehicle only once.
At the end of each interval period, the TDC Ultra beeps. The display
changes to the following:
You are prompted to enter the number of vehicles that are stopped at
the approach, if there are any. Use keys 1-10 (10 = 0) as a keypad to
enter the number. When you press either the Stopped key or the Through
key to count the next vehicle, the number you typed is accepted and
stored in the memory. The Stopped and Through key acts like an Enter
key on a computer.
For example, if there are 17 vehicles stopped, then press the 1 key, then
the 7 key, and then wait for the next car and press either the Stopped
or Through key, whichever is appropriate.
If there are no vehicles stopped, you can press either 0 (key #10) as
explained above or just continue counting with the Stopped or Through
key. The default value is zero, since that is the most common number
you enter. When the light is green, and all of the vehicles are moving,
there are zero vehicles stopped.
If you make a mistake while entering the number just retype the num-
ber until the number shown on the display is correct. Then continue
as usual.
Keep counting the cars with the two keys, and entering the number of
stopped cars every interval, until you have collected data for the amount
of time you decided was necessary.
Intersection Delay
Count:001 Int:002
# of stopped cars:
13:54:24 Rem:00:14
Chapter 6 — Signalized Intersection Delay Studies