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Apparent Presence Time |
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2.22B |
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Vehicle Length |
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Effective Loop Length |
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Speed |
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Loop Occupancy Time |
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L |
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EL |
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S |
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t(P) |
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18.5 |
+ |
9.0 |
/ |
68.8 |
= |
0.40 |
Equation (2.6) |
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feet |
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feet |
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feet/second |
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seconds |
Page 63 |
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(46.9 mph) |
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Vehicle Length |
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Speed |
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Actual Presence Time |
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L |
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S |
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t'(P) |
Modified |
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18.5 |
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/ |
68.8 |
= |
0.27 |
Equation (2.7) |
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feet |
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feet/second |
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seconds |
Page 64 |
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(46.9 mph) |
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20 feet |
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1.5 |
6 |
1.5 |
9.5 |
1.5 |
6 |
1.5 |
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Loop # 2 |
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Loop # 1 |
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L = 6 feet |
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EL = 9 feet |
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18.5 feet |
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9 feet |
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t(P) |
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v |
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Oapp |
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0.40 |
x |
2500 |
= |
1000 |
/ |
3600 |
= |
27.8% |
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sec/veh |
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veh/hour |
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sec/hour |
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sec/hour |
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Apparent Occupancy |
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t'(P) |
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Oact |
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0.27 |
x |
2500 |
= |
675 |
/ |
3600 |
= |
18.8% |
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sec/veh |
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veh/hour |
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sec/hour |
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sec/hour |
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Actual Occupancy |
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Oapp |
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LV |
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EL + LV |
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D |
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27.8% |
x |
5280 |
/ ( |
18.5 |
+ |
9.0 |
) = |
53.3 |
= |
Density |
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feet/mile |
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feet/veh |
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veh/mile |
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Oact |
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LV |
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D |
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18.8% |
x |
5280 |
/ |
18.5 |
= |
53.5 |
= |
Density |
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feet/mile |
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feet/veh |
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veh/mile |
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