CARLY S. QUEENGIS TRANSIT PLANNING TOOLS

CP 6521. ADVANCED GISPROFESSOR. MARTY SUNG

SCHOOL OF CITY AND REGIONAL PLANNINGGEORGIA INSTITUTE OF TECHNOLOGY

Transit Score ModelUser inputs Data + Weights for:

Population

Employment

Poverty

Calculate Field Densities

Spatial Join 3 LayersSummary Statistics Max. Densities

Normalize Data (Scale 0-1)

Apply Weights to Scaled Densities

Calculate Transit ScoreSummary Statistics Max. Score

Score as a Percent (Scale 0-100)

Transit Propensity ModelUser inputs Data + Coefficients for:

Population

White Population

Education Jobs

Health Jobs

PovertyCalculate Field Densities

Spatial Join 3 Layers

Apply Coefficients to DensitiesNegative Binomial Regression Model

Estimate Transit Propensity (Usage)

Model vs. Actual UsageUser inputs Actual Usage Data for:

MARTA Bus Stops Shapefile>0.5 miles from nearest Rail StationLow (<10) Use Stops Excluded from Actual Stop Usage Shapefile

Spatial Join with TransitPropensity.shpCheck Estimated against Actual Usage

Green dots with no Orange dots where model overpredicts stop usage

Continue to Enhance Model as Needed

Develop decision-support tools to aid in transit planning efforts.

Create simple GIS models to estimate area- and stop-level transit propensity.

Regression Betas

PopDens, WhiteDens

EduDens, HealthDens

PovDens Transit Propensity