Ultra Start 15xx Bedienungsanleitung PDF herunterladen (Seite 74)

TDC Ultra User’s Manual

8-6

5. Continue pressing buttons 1C-4C until the last queued vehicle

crosses the stop bar.

6. When the signal turns yellow, press the YELLOW key.

7. When the signal turns red, press the RED key.

8. When you have recorded enough signal changes, turn off the

TDC Ultra or go back to step 2 to record more data.

Type 3 -

Saturation Flow with Signal Timings and Arrival Types

This study is the most difﬁcult to perform, but yields the greatest amount

of data. You can get saturation ﬂow rates, signal timings, approach vol-

umes and arrival types. Because of the complexity of the data collection,

you may want to consider using two people to gather the data.

1. Wait for the signal to turn red, and watch for vehicles to come

to a full stop in the queue.

2. As they do, press the 1S-4S keys for the lanes you are re-

cording.

3. When the signal turns green, press the GREEN key.

4. As each vehicle crosses the stop bar, press the 1C-4C keys for

the lanes you are recording.

5. When the signal turns yellow, press the YELLOW key.

6. When the signal turns red, press the RED key.

7. If you have enough data, turn the TDC Ultra off, or go to step

********IMPORTANT********

The difﬁculty of the data collection increases as you go from Type 1 to

Type 2 to Type 3. If you only need to record the saturation ﬂow rate we

recommend you collect data using Type 1.

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Ultra Start 15xx Bedienungsanleitung Seite 74