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Topic Review
Urban Air Mobility
Urban Air Mobility (UAM) offers a forward-looking solution to urban transport challenges by introducing autonomous, electric aerial vehicles for passenger and cargo movement in cities. Powered by eVTOL technology and supported by advancements in AI, 5G, and air traffic systems, UAM aims to reduce congestion, emissions, and travel time. Its potential spans various sectors—from air taxis and emergency response to logistics and public transport integration—enhancing accessibility and multimodal connectivity. However, key challenges remain in infrastructure development, regulatory harmonization, and public acceptance. Issues such as noise, equity, and privacy require careful governance. Despite technical and social hurdles, continued innovation in battery systems, fleet management, and smart infrastructure positions UAM as a transformative element of future cities. With the right policies and planning, UAM could play a central role in sustainable and inclusive urban mobility.
  • 173
  • 24 Jun 2025
Topic Review
Autonomous Public Transport: Challenges, Opportunities, and Environmental Impacts
Autonomous public transport refers to the deployment of self-driving technologies in shared mobility services such as buses, shuttles, and trams. It holds transformative potential for urban mobility by enhancing efficiency, reducing operational costs, and improving safety. This entry discusses the core technological framework of autonomous public transit systems, their integration into current transport infrastructure, environmental implications, and key challenges to wide-scale adoption.
  • 138
  • 23 Jun 2025
Topic Review
The Diffusion of Autonomous Vehicle
Autonomous vehicles (AVs) represent a transformative innovation in the mobility sector, combining hardware and software systems that enable vehicles to perform driving tasks without human intervention. Using technologies such as radar, LIDAR, and computer vision, these vehicles perceive their environment, interpret sensory data in real-time, and make driving decisions through artificial intelligence algorithms. AVs aim to reduce human error, optimize traffic flow, and improve accessibility and efficiency in transportation systems. The diffusion of autonomous vehicles refers to the process by which this innovation spreads across societies, markets, and infrastructures. As with many emerging technologies, the pace and pattern of diffusion depend on a variety of factors—technological maturity, societal acceptance, legal frameworks, economic incentives, and cultural dynamics. Understanding these factors is crucial to assess when and how AVs might become a mainstream component of transportation ecosystems.
  • 93
  • 23 Jun 2025
Topic Review
Road Safety
This study presents a comprehensive overview of road safety, emphasizing its multidisciplinary nature and global significance. Road traffic accidents (RTAs) remain a leading cause of death and injury worldwide, disproportionately affecting low- and middle-income countries. Key risk factors include speeding, impaired and distracted driving, and poor infrastructure. The report explores core strategies for accident prevention, such as safer road design, traffic management technologies, public education, legislative enforcement, and emergency response systems. It also highlights the role of data-driven research and emerging innovations like autonomous vehicles and AI-based safety systems. Attention is given to vulnerable road users and equity concerns, underlining the need for inclusive and sustainable transport solutions. Ultimately, the paper advocates for a systems-based, collaborative approach to achieve meaningful reductions in traffic-related harm.
  • 88
  • 24 Jun 2025
Topic Review Peer Reviewed
Incorporation of E-Waste Plastics into Asphalt: A Review of the Materials, Methods, and Impacts
This paper presents a comprehensive review of the environmentally friendly management and reutilization of electronic waste (e-waste) plastics in flexible pavement construction. The discussion begins with an overview of e-waste management challenges and outlines key recycling approaches for converting plastic waste into asphalt-compatible materials. This review then discusses the types of e-waste plastics used for asphalt modification, their incorporation methods, and compatibility challenges. Physical and chemical treatment techniques, including the use of free radical initiators, are then explored for improving dispersion and performance. Additionally, in situations where advanced pretreatment methods are not applicable due to cost, safety, or technical constraints, the application of alternative approaches, such as the use of low-cost complementary additives, is discussed as a practical solution to enhance compatibility and performance. Finally, the influence of e-waste plastics on the conventional and rheological properties of asphalt binders, as well as the performance of asphalt mixtures, is also evaluated. Findings indicate that e-waste plastics, when combined with appropriate pretreatment methods and complementary additives, can enhance workability, cold-weather cracking resistance, high-temperature anti-rutting performance, and resistance against moisture-induced damage while also offering environmental and economic benefits. This review highlights the potential of e-waste plastics as sustainable asphalt modifiers and provides insights across the full utilization pathway, from recovery to in-field performance.
  • 70
  • 17 Sep 2025
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