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| 2.1 |
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Time of |
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Vehicle |
Arrival |
Headway |
Headway |
Example |
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Number |
(sec) |
Number |
(sec) |
Calculation |
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1 |
3.74 |
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2 |
12.12 |
1 |
8.38 |
12.12-3.74=8.38 |
What is the mean time headway |
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3 |
17.95 |
2 |
5.83 |
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for the 6 vehicles observed? |
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4 |
24.19 |
3 |
6.24 |
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5 |
26.58 |
4 |
2.39 |
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6 vehicles produce 5 headways |
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6 |
36.16 |
5 |
9.58 |
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Mean Headway: |
6.48 |
h |
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sec/veh |
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Headway |
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Veh. #2 |
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Veh. #1 |
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Gap |
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| Calculate the
mean time headway over the 40 second period. |
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40 / 6 = |
6.67 |
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| What is the flow
rate? |
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| Flow Rate
(veh/hour) = 3600 (sec/hour) / mean headway (sec/veh) |
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| q = 3600 / h |
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| 555 |
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vph |
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