Ultra Start 15xx Bedienungsanleitung PDF herunterladen (Seite 75)

8-7

How to do a Saturation Flow Rate Study

Note: This section describes doing Type 3 data collection, which may

provide more data than you need for your particular study. Refer to the What

Data Do You Need to Collect? section on page 7-5 for more information.

When you are ready to begin a Saturation Flow study, select Count from

the Main Menu, then select New and then select SF.

You are then prompted to select a site code type and assign a site code.

Refer to page 2-5 for information on selecting a site code.

Start Study

After you have selected a Site

Code, you are ready to start the

study. The display shows the

current count number and the

current time.

When you are ready to start, wait until the light turns green, then

press the GREEN key (#12).

The study starts, and the screen

shown here appears.

The display shows the current

time, along with the current

Cycle Number and the cur-

rent Phase of the light. The Cycle Number is used to help you decide

when you have collected enough data. It also is useful if you need to

record any notes about the study. The Phase is shown to help you stay

synchronized during the study. You should check the Phase display

occasionally to make sure you haven't accidentally got lost. (It is very

easy to do!) The phase shown on the display should match the phase

of the light on the street.

As soon as you press the GREEN key to start to study, you have to be

ready to press the 1C-4C keys.

As a vehicle in each lane you are recording crosses the stop bar (you

can either use the front of the car or the end of the car, you just have to

Sat Flow Study

Count: 001

--Any Key to Start--

08:45:06

Sat Flow Study

Cycle:001

Phase: Green

08:45:06

Chapter 8 — Saturation Flow Rate Studies

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Ultra Start 15xx Bedienungsanleitung Seite 75