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A Guidebook for Using American Community Survey Data for Transportation Planning (2007) / Chapter Skim
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Appendix J - Seasonality Analyses Using ACS
Pages 263-275

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From page 263...
... are consistent at about 92 percent, while the seasonal areas, as expected, fluctuate dur263 A P P E N D I X J Seasonality Analyses Using ACS 1 Personal correspondence with Ted Leonard, and Christine Heshmati, Broward MPO on April 29, 2004. Ted Leonard provided an MS Excel file with percentage of seasonal units by TAZ.
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From page 264...
... by Occupancy Status (3) Census 2000 100 Percent Counts 1999-2001 ACS Sampling Rates Census 2000 Sampling Rates Housing Units Housing Units Housing Units Geography Total Occupied Population Total Occupied Population Total Occupied Population Pima County, Arizona 366,737 332,330 821,712 13.4% 9.4% 8.6% 12.5% 12.5% 13.7% San Francisco County, California 346,527 329,700 756,976 9.6% 6.1% 5.5% 11.7% 11.7% 11.8% Broward County, Florida 741,043 654,445 1,603,094 9.5% 6.7% 5.9% 11.7% 11.4% 11.5% Lake County, Illinois 225,919 216,297 623,378 10.3% 7.1% 6.6% 14.3% 14.3% 14.4% Hampden County, Massachusetts 185,876 175,288 441,799 14.6% 10.0% 9.4% 13.4% 13.5% 13.5% Douglas County, Nebraska 192,672 182,194 451,878 15.2% 11.0% 10.5% 13.9% 13.9% 13.9% Bronx County, New York 490,659 463,212 1,285415 10.2% 5.1% 4.4% 11.3% 11.5% 11.6% Franklin County, Ohio 471,016 438,778 1,046,872 9.4% 6.6% 6.2% 14.1% 14.1% 14.1% Multnomah County, Oregon 288,561 272,098 643,798 15.0% 10.7% 10.0% 14.1% 14.1% 14.0% Total for Nine Counties 3,309,010 3,064,362 7,674,922 11.2% 7.5% 6.8% 12.7% 12.7% 12.7% A Rates presented here are based on Decennial Census Totals.
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From page 265...
... If possible, data for the four quarters must be weighted by intercensal estimates that are seasonally adjusted. The Short Form of the decennial census usually included a question on seasonal occupancy and estimates could be developed for housing unit counts by calendar quarter.
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From page 266...
... 40 50 60 70 80 90 100 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Seasonal Area Rest of County Occupancy Rate Figure J.3. Occupancy rates of housing units by calendar quarter.
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From page 267...
... is 9.4 percent for the county. Of the 545 TAZs in Pima County, 42 were classified as "seasonal" Seasonality Analyses Using ACS 267 0 10,000 20,000 30,000 40,000 50,000 60,000 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Civilian Employed - At Work Not in Labor Force Figure J.4.
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From page 268...
... Figure J.6. Percent Civilian Employment-ACS versus Census 2000 (seasonal TAZs in Broward County, Florida)
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From page 269...
... The occupancy rates for the rest of the county are fairly consistent across the calendar quarters at 90.5 to 92.5 perSeasonality Analyses Using ACS 269 0 2 4 6 8 10 12 14 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Seasonal Rest of County Figure J.8. Carpool to work percentage in Broward County, Florida.
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From page 270...
... The rest of the county does not show much 270 A Guidebook for Using American Community Survey Data for Transportation Planning Type of Seasonality Total Occupied Vacant Vacation 800 350 440 University 5,650 5,350 310 Retirement 25,960 19,460 6,540 Total Seasonal 32,410 25,160 7,290 Rest of County (Non-Seasonal) 334,390 307,440 27,370 Table J.4.
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From page 271...
... 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total: Civilian Employed - At Work Not in Labor Force Figure J.12. Civilian employment (seasonal TAZs in Pima County, Arizona)
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From page 272...
... 272 A Guidebook for Using American Community Survey Data for Transportation Planning 0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total: Civilian Employed - At Work Not in Labor Force Figure J.13. Civilian employment (rest of Pima County, Arizona TAZs, non-seasonal)
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From page 273...
... Figure J.15. Percentage civilian employment-ACS versus Census 2000 (rest of Pima County, Arizona TAZs, non-seasonal)
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From page 274...
... 0 5 10 15 20 25 30 35 40 Quarter 1 Quarter 2 Quarter 3 Quarter 4 University Retirement All Seasonal Rest of County Figure J.18. Bike/walk to work percentage in Pima County, Arizona.
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From page 275...
... Seasonality Analyses Using ACS 275
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Key Terms

  • pima county
  • housing units
  • seasonal tazs
  • using acs
  • analyses using

  • seasonality analyses
  • transportation planning
  • using american
  • community survey
  • american community

  • civilian employment
  • calendar quarter
  • versus census
  • work percentage
  • county tazs

  • total occupied
  • occupied housing
  • occupancy rates
  • occupied population
  • civilian employed

  • units housing
  • acs data
  • seasonal variation
  • sampling rate
  • sampling rates

  • arizona tazs
  • defining seasonal
  • population total
  • percent civilian
  • units sampled


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