Smart cities aim to improve the citizens' quality of life by leveraging information about urban scale processes extracted from heterogeneous data sources collected on citywide deployments. The Internet-of-Things (IoT) is, thus, enabler smart city technologies at scale. In this paper, we present PortoLivingLab, a multisource sensing infrastructure that leverages IoT technology achieve city-scale four phenomena: weather, environment, public transport, and people flows. To sense these scale,...

Considering that the transport sector is responsible for an increasingly important share of current environmental problems, we look at Intelligent Transportation Systems (ITS) as a feasible means helping in solving this issue. In particular, evaluate impact terms Carbon Dioxide (CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> )emissions Virtual Traffic Light (VTL), which recently proposed infrastructureless traffic control system...

Modern societies rely on efficient transportation systems for sustainable mobility. In this paper, we perform a large-scale and empirical evaluation of dynamic distributed taxi-sharing system. The novel system takes advantage nowadays widespread availability communication computation to convey cost-efficient, door-to-door flexible system, offering quality service similar traditional taxis. shared taxi is assessed in real-city scenario using highly realistic simulation platform. Simulation...

Road transportation is one of the main sources greenhouse gas emissions, which lead to global warming and climate change. Promoting decarbonization this sector through more efficient greener mobility a challenging task that can be achieved by intelligent systems (ITS) enabled vehicular communications. In paper, we briefly present how players enablers (driver, vehicle, road network) influence energy consumption pollutant emissions. Furthermore, survey paper details different ITS, ranging from...

We perform an extensive study of cooperative awareness in vehicular communication based on periodic message exchange. start by analyzing measurements collected four test sites across Europe. To measure awareness, we use three metrics: 1) neighborhood ratio; 2) ratio neighbors above range; and 3) packet delivery rate. Using the data, define a simple model for calculating given environment. Finally, realistic, large-scale simulations to explore achievable performance under realistic transmit...

Parking is a major problem of car transportation, with important implications in traffic congestion and urban landscape. Reducing the space needed to park cars has led development fully automated mechanical parking systems. These systems are, however, limitedly deployed because their construction maintenance costs. Leveraging on semi fully-autonomous vehicular technology, as well electric propulsion paradigm ad hoc networking, we propose new concept where mobility parked vehicles managed by...

Improved urban mobility can be attained through more efficient vehicle usage and better road network utilisation, namely increased occupancy new operation modes. In this study, the authors focus on a dynamic distributed taxi‐sharing system that takes advantage of nowadays widespread availability communication computation to provide cost‐efficient, door‐to‐door flexible service, offering quality service similar conventional taxis. This has been evaluated following simulation modelling...

Eco-routing distributes traffic in cities to improve mobility sustainability. The implementation of eco-routing real-life requires a diverse set information, including different kinds sensors. These sensors are often already integrated city infrastructure, some technologically outdated, and operated by multiple entities. In this work, we provide use case-oriented system design for an service leveraging Internet-of-Things (IoT) technologies. methodology involves six phases: (1) defining case...

Simulation of vehicular networks has been extensively studied in the last few years. In order to have an holistic view network functioning, communications and vehicle mobility aspects should be modeled detail fully integrated. This article presents a tool for simulating heterogeneous networks. The existing microscopic traffic simulator, DIVERT, extended by adding NS-3 support resulting very tightly integrated simulator. feasibility approach tested means application example: in-vehicle...

We analyze the efficacy of cooperative awareness enabled by periodic message exchange between vehicles and roadside infrastructure. To measure awareness, we use three metrics: 1) neighborhood ratio; 2) ratio neighbors above range; 3) packet delivery rate. Using measurement data collected within scope DRIVE-C2X project in four European test sites, urban, suburban, highway environments. Further, investigate ability to enable for both Vehicle (V2V) Infrastructure (V2I) links with different...

Vehicular Networks enable a vast number of innovative applications, which rely on the efficient exchange information between vehicles. However, and reliable data dissemination is particularly challenging task in context vehicular networks due to underlying properties these networks, limited availability network infrastructure variable penetration rates for distinct communication technologies. This paper presents novel system mechanism collection based virtual selection combination with...

Vehicular networks will enable a number of active safety and traffic efficiency applications. At the core many those applications is cooperative awareness: ability to detect location, speed, heading surrounding vehicles. We empirically analyze three key metrics that shed light on communication performance available applications: Packet Delivery Ratio: link quality in terms proportion received messages over distance; Neighborhood Awareness detected neighbors within given distance, which...

Parking is one of the main elements sustainable mobility policies, with important implications on traffic congestion and urban landscape. Self-automated parking lots have potential to revolutionize by reducing half space occupied per vehicle. We explore solution management strategies without system knowledge (i.e. exit time) for self-automated lots. Through a large-scale empirical evaluation study, we conclude that implementation implies (i) bounded number in-park movements, (ii) similar...

This paper proposes the application of market-based mechanisms to establish cooperative behavior within traffic scenarios involving autonomous vehicles. The aim is understand suitability commonly used auction rules as a potential mechanism for tactical-level collective decision-making in platoon applications considering near-reliable communications. As proof feasibility, two clearing are compared, namely first-price and second-price sealed bid auctions. Both tested according their impact on...

Three main changes are currently taking place in the context of automotive industry: electrification vehicle propulsion, automated driving and a shift towards mobility as service. While first two represent opportunities for industry growth, later questions private ownership car. Keeping concept privately owned car will involve reducing economical environmental cost such ownership. In this paper, we address reduction parking footprint cars, leveraging on low-level automation to more than...

Wireless communications increasingly enable ubiquitous connectivity for a large number of nodes, applications and scenarios. One the less explored scenarios is aquatic communications, specially when considering near-shore short-range communications. Overwater are impaired by distinguishing dynamic factors, such as tides, waves or node mobility, that lead to widely fluctuating unpredictable channel. In this work, we empirically characterize near-shore, overwater channels at 2.4 GHz under...

Considering the fast development of urban areas and increasing environmental awareness, we focus in this paper on a taxi-sharing system for improving efficiency public transport. In particular, present realistic large-scale evaluation impact system. The proposed method improves form transport by determining, fly, best match between taxi user requests, which leads to reduction total vacant travel distance. Our results show important reductions CO <sub...

Despite impressive developments in automated driving technology, several technical, economic and social challenges hinder the large-scale deployment of highly or full vehicles. We present teleoperated - where in-car drivers are replaced by tele-drivers located at a control center- as transient technology to enable driverless, door-to-door taxi service. In this novel service, transmission video audio streams vehicle surroundings via wireless networks dispatch center allows human operator...

The Covid-19 crisis forced governments around the world to rapidly enact several restrictions face associated health emergency. Portuguese government was no exception and, following example of other countries, established various limitations flat contagions curve. This led inevitable repercussions on mobility and environmental indicators including noise. research aims assess impact lockdown due disease noise levels recorded in city Porto, Portugal. Data from four sensors located strategic...

Traffic congestion adversely impacts our lives. estimation resorting to mobile (crowdsensing) probes is a challenging task. We present key challenges for accurate and real-time traffic crowdsensing data, namely data sparsity, user trip diversity, population bias, quality, among others. propose solutions address some of these issues demonstrate the relevance others through an exploratory analysis.

Parking is a key component for efficient urban mobility with implications on congestion and the landscape. We propose planning strategies automated, high-density parking lot systems that efficiently execute (i) selection of vehicle destination (ii) conflict-free motion input output operations. The practical performance system demonstrated through simulation using an empirical dataset. allows halving space requirements vehicles while providing fast access to keeping low in-park travel...

Low-power wide-area networks (LPWANs) are extending beyond the conventional terrestrial domain. Coastal zones, rivers, and wetlands, among others, nowadays common deployment settings for Internet-of-Things nodes where communication technologies such as Long Range (LoRa) becoming popular. In this article, we investigate large-scale fading dynamics of LoRa line-of-sight (LoS) links deployed over an estuary with characteristic intertidal considering both shore-to-shore (S2S) shore-to-vessel...