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    <id>2074</id>
    <completedYear>2021</completedYear>
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    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>395</pageFirst>
    <pageLast/>
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    <edition/>
    <issue>1</issue>
    <volume>13</volume>
    <type>article</type>
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    <title language="eng">Speed Limit Induced CO2 Reduction on Motorways: Enhancing Discussion Transparency through Data Enrichment of Road Networks</title>
    <abstract language="deu">Considering climate change, recent political debates often focus on measures to reduce CO2 emissions. One key component is the reduction of emissions produced by motorized vehicles. Since the amount of emission directly correlates to the velocity of a vehicle via energy consumption factors, a general speed limit is often proposed. This article presents a methodology to combine openly available topology data of road networks from OpenStreetMap (OSM) with pay-per-use API traffic data from TomTom to evaluate such measures transparently by analyzing historical real-world circumstances. From our exemplary case study of the German motorway network, we derive that most parts of the motorway network on average do not reach their maximum allowed speed throughout the day due to traffic, construction sites and general road utilization by network participants. Nonetheless our findings prove that the introduction of a speed limit of 120 km per hour on the German autobahn would restrict 50.74% of network flow kilometers for a CO2 reduction of 7.43% compared to the unrestricted state.</abstract>
    <parentTitle language="eng">Sustainability</parentTitle>
    <identifier type="doi">10.3390/su13010395</identifier>
    <enrichment key="opus.import.data">@articleepub44373, author = Jan Kunkler and Maximilian Braun and Florian Kellner, year = 2021, month = Januar, publisher = MDPI, number = 1, volume = 13, title = Speed Limit Induced CO2 Reduction on Motorways: Enhancing Discussion Transparency through Data Enrichment of Road Networks, pages = 395, journal = Sustainability, abstract = Considering climate change, recent political debates often focus on measures to reduce CO2 emissions. One key component is the reduction of emissions produced by motorized vehicles. Since the amount of emission directly correlates to the velocity of a vehicle via energy consumption factors, a general speed limit is often proposed. This article presents a methodology to combine openly available topology data of road networks from OpenStreetMap (OSM) with pay-per-use API traffic data from TomTom to evaluate such measures transparently by analyzing historical real-world circumstances. From our exemplary case study of the German motorway network, we derive that most parts of the motorway network on average do not reach their maximum allowed speed throughout the day due to traffic, construction sites and general road utilization by network participants. Nonetheless our findings prove that the introduction of a speed limit of 120 km per hour on the German autobahn would restrict 50.74% of network flow kilometers for a CO2 reduction of 7.43% compared to the unrestricted state., keywords = road network analysis; CO2 emissions; speed limits; traffic; navigation services, url = https://epub.uni-regensburg.de/44373/</enrichment>
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    <enrichment key="opus.import.date">2023-04-03T11:21:27+00:00</enrichment>
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    <author>Jan Kunkler</author>
    <author>Maximilian Braun</author>
    <author>Florian Kellner</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>road network analysis; CO2 emissions; speed limits; traffic; navigation services</value>
    </subject>
  </doc>
  <doc>
    <id>2120</id>
    <completedYear>2020</completedYear>
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    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>8145</pageFirst>
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    <edition/>
    <issue>19</issue>
    <volume>12</volume>
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    <title language="eng">Towards Sustainable Cities: Utilizing Floating Car Data to Support Location-Based Road Network Performance Measurements</title>
    <abstract language="eng">Road network performance (RNP) is a key element for urban sustainability as it has a significant impact on economy, environment, and society. Poor RNP can lead to traffic congestion, which can lead to higher transportation costs, more pollution and health issues regarding the urban population. To evaluate the effects of the RNP, the involved stakeholders need a real-world data base to work with. This paper develops a data collection approach to enable location-based RNP analysis using publicly available traffic information. Therefore, we use reachable range requests implemented by navigation service providers to retrieve travel times, travel speeds, and traffic conditions. To demonstrate the practicability of the proposed methodology, a comparison of four German cities is made, considering the network characteristics with respect to detours, infrastructure, and traffic congestion. The results are combined with cost rates to compare the economical dimension of sustainability of the chosen cities. Our results show that digitization eases the assessment of traffic data and that a combination of several indicators must be considered depending on the relevant sustainability dimension decisions are made from.</abstract>
    <parentTitle language="eng">Sustainability</parentTitle>
    <identifier type="doi">10.3390/su12198145</identifier>
    <enrichment key="opus.import.data">@articlebraun_towards_2020, title = Towards Sustainable Cities: Utilizing Floating Car Data to Support Location-Based Road Network Performance Measurements, volume = 12, url = https://epub.uni-regensburg.de/44084/, abstract = Road network performance (RNP) is a key element for urban sustainability as it has a significant impact on economy, environment, and society. Poor RNP can lead to traffic congestion, which can lead to higher transportation costs, more pollution and health issues regarding the urban population. To evaluate the effects of the RNP, the involved stakeholders need a real-world data base to work with. This paper develops a data collection approach to enable location-based RNP analysis using publicly available traffic information. Therefore, we use reachable range requests implemented by navigation service providers to retrieve travel times, travel speeds, and traffic conditions. To demonstrate the practicability of the proposed methodology, a comparison of four German cities is made, considering the network characteristics with respect to detours, infrastructure, and traffic congestion. The results are combined with cost rates to compare the economical dimension of sustainability of the chosen cities. Our results show that digitization eases the assessment of traffic data and that a combination of several indicators must be considered depending on the relevant sustainability dimension decisions are made from., number = 19, journal = Sustainability, author = Braun, Maximilian and Kunkler, Jan and Kellner, Florian, month = oct, year = 2020, note = Place: BASEL Publisher: MDPI, keywords = data collection methods, economic sustainability, navigation services, road network performance, traffic congestion, urban sustainability, COPERT, EMISSIONS, FRAMEWORK, IMPACTS, INDICATORS, RELIABILITY, ROUTE CHOICE BEHAVIOR, TRANSPORTATION, TRAVEL, URBAN TRAFFIC CONGESTION, pages = 8145,</enrichment>
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    <enrichment key="opus.import.date">2023-04-03T13:58:54+00:00</enrichment>
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    <author>Maximilian Braun</author>
    <author>Jan Kunkler</author>
    <author>Florian Kellner</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>road network performance</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>urban sustainability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>economic sustainability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>traffic congestion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>data collection methods</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>navigation services</value>
    </subject>
  </doc>
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