Transportation Insecurity Analysis Tool
Transportation Insecurity Analysis Tool (TIAT)- The Transportation Insecurity Analysis Tool is part of the ETC Explorer and displays selected transportation insecurity data at the state or national level. Users can filter the data via preset thresholds or enter their own. Additionally, users can select layers such as MPO boundaries, alternative fueling stations, safety data, transit routes, intercity bus routes, or any of the five Disadvantage Components to gain a deeper understanding into the relationship between transportation insecurity and the selected layer.
TIAT Filters-
- Urbanized Areas indicate whether a tract contains all, or a portion of, an Urban Area (UZA) with the following population sizes.
- Less than 50k (Definition of ‘Rural’ for most USDOT programs)
- Between 50k-200k (Included in definition of ‘Rural’ for RAISE)
- Greater than 200k
- Percent of Population at or Below 200% of the Federal Poverty Line indicates the percentage of a population within a tract that is at or below 200% of the federal poverty line. Communities with higher percentages have a greater percentage of population with incomes below 200% of the federal poverty level dependent on household size and location (i.e., in all states except AK and HI in 2020, a single person would be at 200% of the federal poverty line with an annual income of $25,520 while a family of four would earn $52,400).
- Less than 20%,
- Between 20%-29.9%
- Between 30% and 39.9%
- Greater than 40%
- Median Household Income indicates the median income of households within the tract, broken into the following categories.
- Between $0-42,731
- Between $42,732-$56,010
- Between $72,321-$98,194
- Greater than $98,195
- Transportation Cost Burden measures a tract’s average spend on transportation as a percentage of household income. The percentage households spent on transportation are presented in the following categories.
- Less than 15%
- Between 15%-19.9%
- Between 20% and 24.9%
- Between 25% and 29.9%
- Greater than 30%
- Estimated cost of transportation measures the amount an average household in the selected tract spends on transportation. The cost is broken into the following categories.
- Less than $10,000
- Between $10,000-$10,999
- Between $11,000-$11,999
- Between $12,000-$12,999
- Between $13,000-$13,999
- Greater than $14,000
- Housing Cost Burden measures the percent of households within the tract spending 30% or more of their income on housing. The following categories represent the percent of households in a tract exceeding 30% of income spent on housing.
- Less than 15%
- Between 15%-24.9%
- Between 25% and 34.9%
- Greater than 35%
- Estimate of households without vehicles indicates the estimated number of households within the tract without a vehicle.
- Less than 50
- 50-99
- 100-149
- 150-249
- Greater than 250
- Transit Availability measures the frequency of transit service per square mile within the tract, as reported by the EPA Smart Location Database. Tracts without any data reported are categorized as “no data reported.” Some of these tracts may have transit service that is not reported to USDOT. Tracts with data reporting are broken into thirds based on transit frequency and categorized as some transit, moderate transit, or lots of transit.
- No data reported
- Some transit
- Moderate transit
- Lots of transit
- Drive Time to POIs were estimated by calculating the average drive time on a Tuesday at 8am from all block group centroids in a tract to the nearest two points of interest. The following points of interest were measured: Adult Education (e.g., colleges, trade schools), Grocery Stores, Medical Facilities, and Parks. Average drive time to the POIs are presented within the following categories.
- Less than 15 minutes
- 15-29 minutes
- 30-60 minutes
- Greater than 60 minutes
- Walk Times to POIs were estimated by calculating the average walk time from all block group centroids in a tract to the nearest two points of interest The following points of interest were measured: Adult Education (e.g., colleges, trade schools), Grocery Stores, Medical Facilities, and Parks. Average walk time to the POIs are presented within the following categories.
- Less than 5 minutes
- 5-14 minutes
- 30-60 minutes
- Greater than 30 minutes
- Broadband Access Categories indicates the percentage of households within the tract with no broadband internet service. The percentages are broken out into the following categories.
- Less than 5%
- Between 5%-14.9%
- Between 15%-24.9%
- Greater than 25%
- Fatalities are based on the 2017-2021 fatality analysis report system data and the fatality rate per 100k people is broken out into quartiles for tracts experiencing at least one fatality over the time period.
- Zero
- Low
- Average
- Above Average
- High
Popup Databoxes
The raw data for a select group of indicators, that reflect transportation insecurity, are reflected in popup databoxes for each Census Tract. Users can select a single Census Tract or project area to view the data for each Census Tract in the selected area. (Users can zoom into map for Census Tract number to appear on the map)
Urbanized Area Summary
Tract contains all or a portion of an Urban Area (UZA) with the following population sizes:
- UZA Population 50k or Less - (Yes/No)
- UZA Population 200k or Less - (Yes/No)
- UZA Population 200k+ - (Yes/No)
Cost Burden Summary
- Poverty Level – “X”% of population in the tract living at or below 200% of the federal poverty line.
- Median Household Income - The median household income in this tract is $“X”
- Transportation Cost Burden - The average household in this tract spends “X”% of their household income on transportation.
- Estimated Cost of Transportation - The average household in this tract spends an estimated $“X” on transportation.
- Housing Cost Burden - “X”% of households in this tract spend more than 30% of their income on housing.
Access Burden Summary
- Number of Households with no Personal Vehicle- An estimated “X%” of households within this tract do not own vehicles.
- Transit Availability - Transit availability in this tract is “X”.
- Estimated Drive Distances - Estimated drive distances to various points of interest are summarized below:
- Adult Education - “X” minutes
- Grocery Stores - “X” minutes
- Medical Facilities - “X” minutes
- Parks - “X” minutes
- Points of Interest within a 15 Minute Walk?
- Adult Education – (Yes/No)
- Grocery Stores - (Yes/No)
- Medical Facilities - (Yes/No)
- Parks - (Yes/No)
- Broadband Access- X% of households in this tract lack internet access.
Safety Summary
- Total Fatalities - Traffic fatalities in this tract are estimated to be “X” per 100k people between 2017-2021.
- Please note- TIAT popup databoxes include the additional data fields for safety.
- Total Fatalities
- Total Motorist Fatalities
- Total Cyclist Fatalities
- Total Pedestrian Fatalities
- Total Other Fatalities
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Last updated: Thursday, November 30, 2023