Home-to-Work Flow from Kentucky to Scott County, Kentucky, home of Toyota Manufacturing Plan.
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Home-to-Work Flow from Kentucky to Scott County, Kentucky, home of Toyota Manufacturing Plan. The following Census Bureau data was used to develop the KYSTM: Geography (TAZ-UP/Combined Zones, Census Block Group, and Census Place);

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Home-to-Work Flow from Kentucky to Scott County, Kentucky, home of Toyota Manufacturing Plan.

  • The following Census Bureau data was used to develop the KYSTM:

  • Geography (TAZ-UP/Combined Zones, Census Block Group, and Census Place);

  • Census Transportation Planning Package (CTPP) Part 3 data; and

  • Census 2000 Summary File.

Census level population and household data were obtained through use of 2000 Summary File 1 data at the CTPP TAZ or Census block level. These smaller levels of geography were then aggregated as necessary to obtain population and household totals for each of the new 3,644 KYSTM TAZs within Kentucky. Household data was used to estimate the number of home-based other (HBO) and non-home based (NHB) trips with Kentucky.

  • As part of the update to the KYSTM, WSA conducted a review of CTPP 2000 Part 1:Data by Place of Residence, CTPP 2000 Part 2: Data by Place of Work, and CTPP 2000 Part 3: Journey-to-Work Flows.

  • The review included:

  • Comparing statewide and county level totals including population, households, etc.

  • Comparisons against other data sources such as the Kentucky State Data Center and Woods & Poole.

  • Reviewing home-to-work flows based on Part 3 data (totals, desire lines, etc).

Journey-to-work (JTW) data were acquired from the CTPP in order to establish a home-based work (HBW) trip table for the KYSTM. The difference between a statewide model and an urban model is that urban models often use HBW trip rates for trip generation. However, in the case of the KYSTM, all HBW trips were based on JTW trips provided from the CTPP data.

  • Issues associated with the data included:

  • Incorrect CTPP Coding – The KYTC took advantage of both the TAZ-UP and Combined Zones efforts offered by the Census Bureau. Zones identified as part of the Combined Zones project were not included in the original CTPP Part 3 dataset; however, after coordination with the Census Bureau, the issue was resolved by the creation of a ‘dummy MPO’ to use for the Combined Zones data.

  • Misidentified zone in Pulaski County – One of the TAZs within Pulaski County Kentucky was missing within the data set and another zone appeared to have too many trips. A reallocation of trips to this zone was necessary.

Journey-to-Work Productions in Carter County, Kentucky.


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