Survey Purpose
To Determine the Origin and
Destination Travel Patterns of Auto Trips Crossing the Fairfax /
Prince William County Line on the Existing Road Network during the
Periods of Greatest Traffic Congestion.
Survey Methodology
- Randomly Select License Tag Numbers
of VA, DC, MD Cars, Vans, and Light Trucks
- Match Against DMV Vehicle
Registrations
- Send Vehicle Owner Postcard Survey
- Review and Edit Returned Surveys
- Geocode to Trips Origins and
Destinations to Transportation Analysis Super Districts
- Expand Survey Data on VDOT Traffic
Control Counts
Study Limitations
- Results Are Based on a Random
Sample - Sampling Error
- "In-State" Autos Only
- Late Spring / Early Summer Time of
Year
- Potential Non-Response Bias
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Comparison with 1990 Census
Transportation Planning Package (CTPP)
- O-D Survey Results Match Very Well,
Once Household Growth and Shifts in Regional Employment Since 1990
are Taken into Account.
- Comparison with CTPP Validates O-D
Survey Results and that the Survey Results are Representative of
Normal Peak Period Auto Travel Across the Fairfax County / Prince
William County Line.
O-D Survey is Only a Snapshot
The 1998 Survey is only a Snap Shot of
Current Travel Patterns of Peak Period Auto Trips Crossing the Fairfax
/ Prince William County Line. This Study Does Not Address the Issues
of Proposed Transportation Changes or Land Use Projections.
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Survey Response Rates
| Inbound
- AM Peak Period (5:00 AM - 10:00 AM) |
| Roadway |
Survey
Dates |
Target
Surveys |
Returned
"Good" Surveys |
%
of Target |
| U.S. 1 N |
6/11 |
294 |
437 |
149% |
| I-95 N |
6/17,
6/24, 7/14, 7/15, 7/16 |
886 |
1,283 |
145% |
| I-95
(HOV) |
6/23,
6/24, 6/25 |
273 |
639 |
234% |
| Va. 123
N |
6/9 |
216 |
451 |
209% |
| Va. 612
N |
5/20,
5/21 |
200 |
440 |
220% |
| Va. 28 N |
6/2, 6/3 |
208 |
469 |
225% |
| Va. 616
N |
5/27,
5/28 |
200 |
307 |
154% |
| I-66 E |
6/18,
6/30, 7/1 |
777 |
792 |
102% |
| U.S. 29
N |
6/4 |
200 |
291 |
146% |
| All
Inbound - 5:00 AM - 10:00 AM |
3,254 |
5,109 |
157% |
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| Outbound
- PM Peak Period (2:30 PM - 7:30 PM) |
| Roadway |
Survey
Dates |
Target
Surveys |
Returned
"Good" Surveys |
%
of Target |
| U.S. 1 S |
6/11 |
276 |
395 |
143% |
| I-95 S |
6/17,
6/24, 6/25, 7/14 |
880 |
986 |
112% |
| I-95
(HOV) |
6/23,
6/25 |
367 |
594 |
162% |
| Va. 123
S |
6/9,
6/10, 6/17 |
205 |
443 |
211% |
| Va. 612
S |
5/20,
5/21 |
200 |
583 |
292% |
| Va. 28 S |
6/2, 6/3 |
250 |
490 |
196% |
| Va. 616
S |
5/27,
5/28 |
200 |
310 |
155% |
| I-66 W |
6/18,
6/30, 7/1 |
650 |
1,056 |
162% |
| U.S. 29
S |
6/4 |
200 |
342 |
171% |
| All
Outbound - 2:30 PM - 7:30 PM |
3,228 |
5,189 |
161% |
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Daily
Two-Way Traffic Across Fairfax/Prince William County
Line by
Roadway
Return to
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Daily
Two-Way Traffic Across Fairfax/Prince William County
Line by
Direction and Time of Day
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Characteristics
of Peak Period Auto Travel
Most Peak Period Trips Crossing the
Fairfax County / Prince William County Line Are:
- Commuting Trips
- 85% AM Peak Period (Inbound)
- 71% PM Peak Period (Outbound)
- Single Occupancy Vehicles (SOVs)
- 80% AM Peak Period (Inbound)
- 74% PM Peak Period (Outbound)
- Persons in Households with Two or
More Vehicles Available:
- 81% AM Peak Period
- 82% PM Peak Period
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Summary
of Origins and Destinations
1998
Fairfax County / Prince William County O-D Survey
Jurisdiction
to Jurisdiction - Trip Table
Inbound Trips - (5:00 AM - 10:00
AM) Peak Period |
|
|
| |
Origins: |
| |
73% |
- Prince William Co.
/ Manassas / Manassas Park |
| |
14% |
- Stafford Co. /
City of Fredericksburg / Spotsylvania Co. |
| |
6% |
- Fauquier Co. |
| |
8% |
- VA South &
Other Areas |
|
|
|
| |
Destinations: |
| |
68% |
- Fairfax Co. / City
of Fairfax / City of Falls Church |
| |
15% |
- Arlington /
Alexandria |
| |
9% |
- District of
Columbia |
| |
3% |
- Loudoun County |
| |
5% |
- Maryland &
Other Areas |
|
|
| |
Major
O-D Flows: |
| |
49% |
- From Prince
William Co. / Cities to Fairfax Co. / Cities |
| |
24% |
- From Prince
William Co. / Cities through Fairfax |
| |
19% |
- From S. of Prince
William to Fairfax Co. / Cities |
| |
8% |
- From S. of Prince
William through Fairfax |
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1998
Fairfax County / Prince William County O-D Survey
Jurisdiction
to Jurisdiction - Trip Table
Outbound Trips - (2:30 PM - 7:30
PM) Peak Period |
|
|
| |
Origins: |
| |
65% |
- Fairfax Co. / City
of Fairfax / City of Falls Church |
| |
16% |
- Arlington /
Alexandria |
| |
9% |
- District of
Columbia |
| |
4% |
- Loudoun County |
| |
6% |
- Maryland &
Other Areas |
|
|
|
| |
Destinations: |
| |
71% |
- Prince William Co.
/ Manassas / Manassas Park |
| |
14% |
- Stafford Co. /
City of Fredericksburg / Spotsylvania Co. |
| |
6% |
- Fauquier Co. |
| |
9% |
- VA South &
Other Areas |
|
|
| |
Major
O-D Flows: |
| |
47% |
- From Fairfax Co. /
Cities to Prince William Co. / Cities |
| |
18% |
- From Fairfax Co. /
Cities through Prince William |
| |
24% |
- From N. of Fairfax
Co. / Cities to Prince William Co. / Cities |
| |
11% |
- From N. of Fairfax
through Prince William |
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1998 Fairfax
County/Prince William County O-D Survey
Super Districts Map
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O-D
Survey Auto Trips by Origin and Destination Super District
O-D
Survey Auto Trips by Origin Super District
Inbound Trips - (5:00
AM - 10:00 AM) Peak Period |
| Origin
Super District |
Auto
Trips |
Percent |
Cumulative
Percent |
| Lake Ridge/Occoquan |
14,679 |
19.4 |
19.4 |
| Manassas/Manassas
Park |
14,092 |
18.6 |
38.0 |
| Dale City/Montclair |
8,887 |
11.7 |
49.7 |
| Woodbridge |
6,657 |
8.8 |
58.5 |
| Stafford Co. (West) |
4,061 |
5.4 |
63.9 |
| Warrenton/Fauquier
Co. (North) |
3,554 |
4.7 |
68.6 |
| Fredericksburg/Spotsylvania
Co. |
3,238 |
4.3 |
72.9 |
| Central Prince
William |
3,090 |
4.1 |
77.0 |
| Stafford Co. (East) |
2,971 |
3.9 |
80.9 |
| Haymarket/Linton Hill |
2,613 |
3.5 |
84.4 |
| External - S. of
Fredericksburg |
2,163 |
2.9 |
87.3 |
| External - S. and W.
of Warrenton |
2,002 |
2.6 |
89.9 |
| External - I-66 W. of
Markham |
1,658 |
2.2 |
92.1 |
| Brentsville/Lake
Jackson |
1,522 |
2.0 |
94.1 |
| Dumfries |
1,516 |
2.0 |
96.1 |
| Woolsey/Catharpin |
1,280 |
1.7 |
97.8 |
| Fauquier Co. (South) |
1,011 |
1.3 |
99.1 |
| Prince William Forest
Park |
366 |
0.5 |
99.6 |
| King George Co. |
63 |
0.1 |
99.7 |
| Other |
220 |
0.3 |
100.0 |
| Total |
75,643 |
100.0 |
|
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O-D
Survey Auto Trips by Destination Super District
Inbound Trips -
(5:00 AM - 10:00 AM) Peak Period |
| Destination
Super District |
Auto
Trips |
Percent |
Cumulative
Percent |
| Ft. Belvoir/Mason
Neck |
8,433 |
11.1 |
11.1 |
| Herndon/Reston |
5,074 |
6.7 |
17.8 |
| Tysons |
4,984 |
6.6 |
24.4 |
| D.C. (Core) |
4,929 |
6.5 |
30.9 |
| Alexandria |
4,875 |
6.4 |
37.3 |
| Fairfax Center |
4,701 |
6.2 |
43.5 |
| Arlington Co. (Core) |
4,545 |
6.0 |
49.5 |
| City of Fairfax/GMU |
4,139 |
5.5 |
55.0 |
| Falls
Church/Annandale |
3,336 |
4.4 |
59.4 |
| Chantilly |
3,334 |
4.4 |
63.8 |
| Merrifield |
3,000 |
4.0 |
67.8 |
| Franconia |
2,269 |
3.0 |
70.8 |
| Huntington/Mt. Vernon |
2,263 |
3.0 |
73.8 |
| Dulles/Sterling |
2,200 |
2.9 |
76.7 |
| Lorton |
2,187 |
2.9 |
79.6 |
| D.C. (Non-Core) |
2,068 |
2.7 |
82.3 |
| Centreville |
2,005 |
2.7 |
85.0 |
| Arlington Co.
(Non-Core) |
1,949 |
2.6 |
87.6 |
| Montgomery Co. |
1,557 |
2.1 |
89.7 |
| Oakton/W. Vienna |
1,511 |
2.0 |
91.7 |
| Springfield |
1,435 |
1.9 |
93.6 |
| Burke |
1,176 |
1.6 |
95.2 |
| Prince George's Co. |
1,140 |
1.5 |
96.7 |
| McLean |
927 |
1.2 |
97.9 |
| External Beyond Outer
Md. Suburbs |
494 |
0.7 |
98.6 |
| Outer Md. Suburbs |
319 |
0.4 |
99.0 |
| Clifton |
192 |
0.3 |
99.3 |
| Loudoun Co. (West) |
149 |
0.2 |
99.5 |
| Colchester |
130 |
0.2 |
99.7 |
| Great Falls |
105 |
0.1 |
99.8 |
| Other |
217 |
0.3 |
100.1 |
| Total |
75,643 |
100.1 |
|
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Major
Super District to Super District Movements
| Inbound
Trips - (5:00 AM - 10:00 AM) Peak Period |
|
|
|
Super
District to Super District
O-D Movement |
Auto
Trips |
|
|
|
|
From:
Lake Ridge/Occoquan |
|
| |
To: Ft.
Belvoir/Mason Neck |
2,188 |
| |
To:
Arlington (Core) |
1,581 |
| |
To:
Alexandria |
1,556 |
| |
To: D.C.
(Core) |
1,160 |
|
To:
Tysons |
796 |
|
To:
Huntington/Mt. Vernon |
714 |
|
To:
Herndon/Reston |
628 |
|
To: City
of Fairfax/GMU |
604 |
|
To:
Falls Church/Annandale |
530 |
|
To:
Arlington (Non-Core) |
522 |
|
To:
Merrifield |
500 |
|
|
|
| |
From:
Manassas/Manassas Park |
| |
To:
Herndon |
1,749 |
| |
To:
Fairfax Center |
1,491 |
| |
To:
Chantilly |
1,369 |
| |
To:
Tysons |
1,321 |
| |
To: City
of Fairfax/GMU |
1,080 |
| |
To:
Centreville |
939 |
| |
To:
Dulles/Sterling |
853 |
| |
To:
Merrifield |
766 |
| |
To:
Falls Church/Annandale |
532 |
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| Inbound
Trips - (5:00 AM - 10:00 AM) Peak Period |
|
|
|
Super
District to Super District
O-D Movement |
Auto
Trips |
|
|
|
|
From:
Dale City/Montclair |
|
| |
To: Ft.
Belvoir/Mason Neck |
1,476 |
| |
To: D.C.
(Core) |
965 |
| |
To:
Arlington (Core) |
691 |
| |
To:
Alexandria |
668 |
|
|
|
|
From:
Fredericksburg (Spots Co. - North) |
|
|
To: Ft.
Belvoir/Mason Neck |
931 |
|
|
|
|
From:
Stafford Co. (West) |
|
|
To: Ft.
Belvoir/Mason Neck |
830 |
|
|
|
| |
From:
Woodbridge |
| |
To:
Alexandria |
790 |
| |
To: Ft.
Belvoir/Mason Neck |
788 |
| |
To:
Arlington (Core) |
589 |
| |
To: D.C.
(Core) |
537 |
| |
|
|
| |
From:
Stafford Co. (East) |
|
| |
To: Ft.
Belvoir/Mason Neck |
789 |
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Roadways
Used to Reach Destination Super Districts
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|
