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Integrating road traffic externalities through a sustainability indicator.

P Fernandes1, M Vilaça1, E Macedo1

  • 1Department of Mechanical Engineering, Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.

The Science of the Total Environment
|July 21, 2019
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Summary
This summary is machine-generated.

This study introduces a sustainability indicator to quantify road traffic

Keywords:
External costsModelingRoad trafficSustainability indicatorTraffic externalities

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Area of Science:

  • Environmental Science
  • Transportation Engineering
  • Sustainability Studies

Background:

  • Road traffic generates significant negative externalities, challenging sustainable transportation goals.
  • A lack of common metrics hinders the comprehensive assessment of diverse traffic externalities.
  • Existing research often overlooks the integration of multiple externalities into a unified measure.

Purpose of the Study:

  • To develop a novel sustainability indicator for road traffic externalities.
  • To integrate traffic congestion, noise, greenhouse gas (GHG) and nitrogen oxides emissions, health impacts, and road crash costs into a single metric.
  • To adjust the indicator for local vulnerability contexts.

Main Methods:

  • Data collection on traffic, road crashes, acoustics, and vehicle dynamics from a real-world intercity corridor.
  • Utilized a modeling platform for traffic, emissions, noise, and air quality characterization.
  • Applied specific methodologies for each externality, translating them into a single 'external cost' factor.

Main Results:

  • Road crashes were the largest external cost component on a partly rural/urban route.
  • Greenhouse gas (GHG) emissions dominated external costs on highway routes.
  • The distribution of external costs varied by road type, influenced by exposed populations.

Conclusions:

  • The developed indicator provides a reliable and flexible cost analysis for decision-makers.
  • The findings support the reduction of negative road traffic impacts.
  • Encourages eco-traffic management policies considering diverse stakeholder perspectives.