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Health research needs more comprehensive accessibility measures: integrating time and transport modes from open data.

Henrikki Tenkanen1, Perttu Saarsalmi2,3, Olle Järv2

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Integrating time and travel modes into health accessibility studies is crucial. Analyzing healthy food access reveals how transport options and time of day significantly impact urban accessibility, preventing planning inequalities.

Keywords:
AccessibilityDoor-to-door approachFoodHealthMultimodalOpen dataPrivate carPublic transportSpatio-temporalTravel time

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Area of Science:

  • Urban planning and public health
  • Geographic Information Systems (GIS) and spatial analysis
  • Transportation science

Background:

  • Health-related accessibility studies often overlook temporality and multimodality.
  • This oversight can lead to inaccurate assessments of healthy food accessibility in urban areas.
  • Integrating spatio-temporal and multimodal measures is essential for realistic urban research.

Purpose of the Study:

  • To demonstrate the importance of integrating temporality and multimodality in health accessibility research.
  • To propose a methodological approach for combining travel modes and temporality in spatial accessibility analyses.
  • To analyze healthy food accessibility in the Helsinki metropolitan area, Finland.

Main Methods:

  • Spatial analyses conducted on 250m statistical grid squares.
  • Travel times measured from residences to grocery stores at 5 PM, 10 PM, and 1 AM using public transport and private cars.
  • Employed a door-to-door approach for realistic, comparable travel time measurements across modes.

Main Results:

  • Both time of day and mode of transport significantly impact accessibility outcomes.
  • Travel time to healthy food sources varies considerably depending on the time.
  • Public transport can be faster than private cars for accessing healthy food in central urban areas with dense networks.

Conclusions:

  • Temporality and transport modes are critical components for modeling urban health-related accessibility.
  • Neglecting these factors can result in simplified or erroneous accessibility assessments.
  • Inaccurate accessibility measures risk creating health inequalities due to flawed planning and decision-making.