01042407

Component

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In the 1980-1990s, the Florida Metropolitan Planning Organizations (MPOs) used the decennial census and a time-consuming Delphi or other technique to develop existing and projected land uses for transportation modeling purposes. For the current updates of the Long Range Transportation Plans, Geographic Information System (GIS) techniques have helped to overcome the lack of a decennial census. The Urban Land Allocation Model (ULAM) provided a time-effective tool to provide alternative land use scenarios based on policy and transportation improvements. Existing land use data for single family, multi-family, industrial, commercial, and service uses were estimated through a series of overlays using GIS techniques. A combination of the comprehensive plan existing land use maps and Property Appraiser’s data provides the best information. GIS can be used to compare census/employment data. The Urban Land Allocation Model (ULAM) was developed by Transportation Planning Services, Inc. and provided to all Florida MPOs by the Florida Department of Transportation. ULAM projects land uses for transportation modeling purposes. Once the input files are developed, ULAM allocates residential and employment growth in less than one minute. This allows for many alternative land uses to be developed and tested. ULAM input files include control population/employment projections, vacant land in acres, approved development, allowable densities, and optional market index calculations. All of these data were required in some form for use in the Delphi method. The optional market index calculation included alternative land use policies considered by the local governments such as infill, sewer system plans, and developments of regional impact. ULAM also uses highway and transit networks in its projections to account for accessibility. This allowed needs and cost feasible networks to be tested regarding potential influences on growth. GIS is used to evaluate these influences. The ULAM model is currently being used with the standard Florida trip generation model which uses dwelling units and also with two different types of “life style” based trip generation models which use detailed household demographic information for trip generation. This paper will address the ULAM process and show examples of use in the Tallahassee-Leon County Plan Update.

01042451

English

8p

2000

Seventh National Conference on Transportation Planning for Small and Medium-Sized Communities

CD-ROM

Accessibility; Demographics; Development; Dwellings; Employment; Forecasting; Geographic information systems; Highways; Households; Land use; Land use models; Land use planning; Long range planning; Metropolitan planning organizations; Population; Public transit; Regional planning; Residential areas; Sewers; Transportation planning; Trip generation; Urban areas; Urban growth

Infills (Materials); Transportation modeling

Florida

Highways; Planning and Forecasting; Public Transportation; Society; Terminals and Facilities; I10: Economics and Administration; I72: Traffic and Transport Planning

TRIS, TRB

Feb 28 2007 1:13PM

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