Transcript NHTS Status - FSUTMSOnline

Model Task Force Data Committee
October 17, 2008
National Household Travel Survey
(NHTS) Add-on Status
1
Presentation Overview

Funding and NHTS Background

Sampling Plan

Current Status

Discussion
2
Funding and NHTS Background

Funding approved by MPOAC via PL Funds
– Total cost for 12,000 urban samples is $2,100,000
– Data analysis & tabulation $500,000
– FDOT allocated $350,000 for 2,000 rural samples
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Funding and NHTS Background

Daily data collected includes:
– Purpose of the trip (work, shopping, etc.)
– Means of transportation used (car, bus, subway, walk, etc.)
– How long the trip took (i.e., travel time)
– Time of day when the trip took place
– Day of week when the trip took place
– Private vehicle trip details

number of people in the vehicle (i.e., vehicle occupancy)

driver characteristics (age, sex, worker status, education level, etc.)

vehicle attributes (make, model, model year, amount of miles driven in a year)
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Funding and NHTS Background

Data used to:
– Quantify travel behavior
– Analyze changes in travel characteristics over time
– Relate travel behavior to the demographics of the traveler
– Study the relationship of demographics and travel over time
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Data items not included:
– Travel costs
– Information on specific routes
– Longitudinal information
– Reasons for specific mode
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Sampling Plan

Proposed Sampling Plan
– Region 1 – Collier, Lee, Charlotte, Sarasota, and Manatee (Census 2000
–
–
–
–
–
–
Households: 545,158 )
Region 2 – Duval, St. Johns, Clay, Nassau, and Alachua (Census 2000
Households: 613,890 )
Region 3 – Leon, Gadsen, Wakulla, Walton, Okaloosa, Santa Rosa,
Escambia, and Bay (Census 2000 Households: 424,149 )
Region 4 – Broward, Miami-Dade, Palm Beach, Indian River, St. Lucie, and
Martin (Census 2000 Households: 2,150,666 )
Region 5 – Orange, Osceola, Seminole, Lake, Sumter, Brevard, Volusia, and
Marion (Census 2000 Households: 1,040,095 )
Region 7 – District 7 (except Citrus) and Polk (Census 2000 Households:
1,196,954 )
Region 8 – Rural counties not in the first six (Census 2000 Households:
370,209 )
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Sampling Plan
Sample Size
Number of
Households
Region
Total
Original
Revised
Confidence Interval (95% CL)
Original
Revised
1
545,158
1,096
1,200
± 3.0%
± 2.8%
2
613,890
1,234
1,234
± 2.8%
± 2.8%
3
424,149
852
1,200
± 3.4%
± 2.8%
4
2,150,666
4,322
4,116
± 1.5%
± 1.5%
5
1,040,095
2,090
2,000
± 2.1%
± 2.2%
7
1,196,954
2,406
2,250
± 2.0%
± 2.1%
8
370,209
2,000
2,000
± 2.2%
± 2.2%
6,341,121
14,000
14,000
± 0.8%
± 0.8%
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Sampling Plan
Region
Sample Size
Region 1
1,200
Region 2
1,224
Region 3
1,200
Region 4
4,116
Region 5
2,000
Region 7
2,250
Region 8
2,000
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Sampling Plan

MPO Sample Size

Each MPO will be sampled such that atleast 80% of the sampled
households from the MPO are included in the region sample
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Why do this?
– Makes data collection more cost effective
– Ensures sufficient samples for segmentation
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Sampling Plan
Rural Counties
FDOT District
Rural Total
Total Households
Sample Size
Confidence
Interval (95% CL)
1
83,828
453
± 4.6%
2
125,436
678
± 3.8%
3
51,894
280
± 5.9%
5
21,284
115
± 9.2%
6
35,106
190
± 7.1%
7
52,661
284
± 5.8%
370,209
2,000
± 2.2%
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Current Status

Very positive response rate

Slated to complete in April 2009
Region
Category
Total Target Sample Size
Total
FL
14,000
14,000
6,278
6,278
% of Completion Goal
44.8%
44.8%
Extended (Retrieval) HH
Cooperation Rate (%)
74.1%
74.1%
Useable Households (final) as
of 10/14/2008
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Current Status
Statewide Completion
100%
90%
Percent Complete
80%
70%
60%
50%
40%
30%
20%
10%
0%
Region 1
Region 2
Region 3
Region 4
Region 5
Region 7
Region 8
Sampling Region
12
Current Status
Region 1 and Region 2
100%
90%
Percent Complete
80%
70%
60%
50%
40%
30%
20%
10%
0%
Charlotte County- Collier County MPO
Punta Gorda MPO
Lee County MPO
Sarasota/Manatee
MPO
North Florida TPO
Gainesville MTPO
MPO
13
Current Status
Region 3 and Region 4
100%
90%
Percent Complete
80%
70%
60%
50%
40%
30%
20%
10%
0%
Bay County Capital
TPO
Region
TPA
Florida- Okaloosa- Broward
Alabama Walton TPO MPO
TPO
Indian
River
County
MPO
Martin Miami-Dade Palm
County
Beach
MPO
County
MPO
St. Lucie
TPO
MPO
14
Current Status
Region 5 and Region 7
100%
90%
Percent Complete
80%
70%
60%
50%
40%
30%
20%
10%
0%
Brevard MPO
Lake-Sumter
MPO
Ocala/Marion
County TPO
METROPLAN
Orlando
Volusia County
MPO
Hernando
County MPO
Hillsborough
County MPO
Pasco County
MPO
Pinellas County
MPO
Polk TPO
MPO
15
Current Status
15%
14%
13%
12%
11%
10%
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Travel Day of Week
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Discussion
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