Table 1
Conventional Time-of-Day Highway Peaking Factors
AM and PM Peak Hours - San Francisco Bay Area

AM/PM Peak Hour
Trip Purpose
Trip Direction
1965
Survey

1981
Survey

1990
Survey
1990/2010
Forecasts






AM Peak Hour Factors
Home-Based Work
Weighted Average
H –> W
0.17021
0.15656
0.15436
NA
W –> H
0.00462
0.00483
0.00329
NA






Home-Based Non-Work
H –> NW
0.03162
0.04146
0.05319
0.04476
NW –> H
0.01261
0.01459
0.01549
0.01576






Non-Home-Based
NW –> NW
0.02077
0.02404
0.02797
0.02404






HBW Drive Alone
H –> W
NA
0.14597
0.14418
0.14597
W –> H
NA
0.00514
0.00352
0.00514






HBW Shared Ride 2+
H –> W
NA
0.17763
0.18514
0.17763
W –> H
NA
0.00172
0.00158
0.00172






PM Peak Hour Factors
Home-Based Work
Weighted Average
H –> W
0.00686
0.00801
0.00788
NA
W –> H
0.15601
0.12637
0.12533
NA






Home-Based Non-Work
H –> NW
0.03162
0.03528
0.02769
0.03626
NW –> H
0.05506
0.06155
0.05050
0.06325






Non-Home-Based
NW –> NW
0.08814
0.08388
0.08207
0.08388






HBW Drive Alone
H –> W
NA
0.00790
0.00837
0.00790
W –> H
NA
0.12661
0.12612
0.12661






HBW Shared Ride 2+
H –> W
NA
0.00857
0.00661
0.00857
W –> H
NA
0.13595
0.12066
0.13595






Bay Bridge Spread Peak Factor
NA
NA
NA
0.62000
Ala/SC Spread Peak Factor
NA
NA
NA
0.70000






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