SPATIAL ASSESSMENT ANALYSIS

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For State Road 874 Mainline reconstruction.

University of Southern California

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Miami-Dade County, Florida.

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State of Florida

Miami-Dade County

State Road 874State Road 874

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SPATIAL ASSESSMENT ANALYSISFor State Road 874 Mainline reconstruction. c

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For State Road 874 Mainline reconstruction. Miami-Dade County, Florida.

Introduction –G

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IntroductionComputerized

Maps(location data)

Computerizeddatabases

(location data)

The ability of GIS technology to store, describe, and analyze spatial relationships

G.I.S.

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Geographic information systems (GIS) link computerized maps (location data) to computerized databases which describe the attributes of the location(s).

spatial relationships enhances the ability to assess ecosystem conditions, and design management M

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This Spatial analysis refers to ask/answer i b i l l i hi i GIS


Introduction –G

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questions about spatial relationships using a GIS.Introduction

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The merger of location and attribute data results in a spatial database that has the

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capability to answer three basic questions: where is it; what is it; and what is next to it

The where of the spatial database is the specific location represented through a system of coordinates

The what refers to descriptions--or attributes--of features in the site,

The what is next to it of the spatial database

-North American Datum-1983- Florida State Plane East (US

Feet) projection

-Aesthetic Structures-And sign structures

- use of existing infrastructure

-refers to the geographic context of features in the site

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BackgroundGrowth and new residential and industrial developments in the area as well as the lack of an interconnected roadway system –

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Background have created increasingly congested traffic conditions in the area which eventually translates into longer commutes and quality-of-life issues.

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Methods Identify -Transport –G

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Methods Identify Assessment criteria

-Transport-Ecology

-Social and Safety-Economy

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(Pre)Processing-Remote sensing imagery

-Vector data (road network)-Raster data (HMR raster images)

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Weighting -Stake holder priorities-Expert knowledge

Spatial -Prepare a geographic surface wherein each pixel shows the overall suitability

Assessmenteach pixel shows the overall suitability for the suggested improvements to the

existing roadway

Network -Values of existing and previous suitability mapsanalysis suitability maps

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Methods Cont Personal experience as highway/bridge engineer is draw upon inAssessment criteria

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Theme Criteria Purpose

Transport Proximity to rail network The closer the expressway is built to an existing rail network, the better the future intermodality.

Methods Cont. -Personal experience as highway/bridge engineer is draw upon in listing technical criteria

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future intermodality.

Current Traffic density Spatial benefitThe higher the current traffic density, the more is the reason to upgrade the road.

Ecology Protection of natural areas Spatial constraintNational parks, Landscape parks, and national reserves

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Wetlands, Water courses, and lakes Spatial cost

Social and Safety Urban areas Spatial benefit The closer the route is to an urban area, the greater the social convenience.Spatial Cost The closer the route is to an urban area, the greater are the incidences.

Population served Spatial benefit the higher the population served, the more is the reason to upgrade the road.

Economy Economic zones Spatial benefit the more the economic activity in the area, the more is the reason to upgrade the road.

Problem soils for construction Spatial cost soils are prone to differential settlement and pose a potentially high construction cost and/or high maintenance cost. Cost of mitigation should be accounted for.

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Data The data in this spatial assessment analysis is described in terms of l h l i i l f f –

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Data layers; each layer representing a particular set of features. The Base map data, may include separate layers for roads, streams, soils, elevation, vegetation, and inventory plots.

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Layer: Bridge Layout M.S

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Layer: utilities Layout Layer: Survey Layout

Layer: Intelligent Transportation System (ITS) Layout7


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Study Area –G

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Study Area

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ResultsThe SR 874 Ramp Connector would provide an alternate travel route, relieving the actual congestion and improve overall traffic operations in the area –

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Results congestion and improve overall traffic operations in the area.

It will provide expressway access to the growing community of south-west Miami-Dade, which presently is only serviced by access thru secondary streets.

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A result using a Spatial multi-criteria assessment: Social vision A result of the network analysis: the route alternative with improvements9


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Conclusions –G

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Conclusions

Criteria of governmental agencies

-The preferred route in original studies is

Visions considered-Social-Economy-ecology IS

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The preferred route in original studies is available- the criteria of :

protect ecological areas, vehicle-hours, traffic intensity,

Taken into consideration

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ancillary structures required,category of road

Network analysis G.I.S.+ +

Improvement in existing structures

-The suggested route is environmental friendly

-The suggested route is taking into account a wide range of social,

-The use of remote sensing, GIS and spatial techniques generate a more ff ti d i i t ttechnical and

environmental criteriaeffective decision support system

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cla

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For State Road 874 Mainline reconstruction.


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Miami-Dade County, Florida.

Acknowledgement:

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-BHA/AZTEC Consulting Engineers. Mss Soheila Sadough, PhD, P.E.

- Miami-Dade Expressway Authority (MDX) public records

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-Suhad Kesamat, Formulation/Evaluation of Transport/PlanningSuhad Kesamat, Formulation/Evaluation of Transport/Planningusing Spatial Criteria

Thank YoThank You

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SPATIAL ASSESSMENT ANALYSIS

Technology

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