Tamas Tettamanti

Tamas Tettamanti
Budapest University of Technology and Economics · Department of Control for Transportation and Vehicle Systems

PhD

About

117
Publications
72,282
Reads
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965
Citations
Citations since 2016
89 Research Items
875 Citations
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Introduction
Tamas Tettamanti currently works at the Department of Control for Transportation and Vehicle Systems, Budapest University of Technology and Economics. Tamas does research in Transportation Engineering. Their current project is 'Testing and Validation of Connected and Automated Vehicles'.
Additional affiliations
September 2007 - present
Budapest University of Technology and Economics
Position
  • Professor (Associate)
Education
September 2002 - June 2007
Budapest University of Technology and Economics
Field of study
  • Transportation Engineering

Publications

Publications (117)
Article
Full-text available
Vehicle dynamics models are widely used in many areas of the automotive industry. The usability of each model depends on how well it is able to mimic the behavior of the real vehicle. Each simulation model must go through a thorough investigation process first, which is called model validation. Although, vehicle dynamics simulation models and metho...
Article
Full-text available
There is consensus in industry and academia that Highly Automated Vehicles (HAV) and Connected Automated Vehicles (CAV) will be launched into the market in the near future due to emerging autonomous driving technology. In this paper, a mixed traffic simulation framework that integrates vehicle models with different automated driving systems in the...
Article
Full-text available
In this article, the basic Reinforcement Learning (RL) concepts are discussed, continued with a brief explanation of Markov Decision Processes (MDPs). Reasoning for the application of RL in the autonomous vehicle control domain is accompanied with a developed basic environment for simulation-based training of agents. Furthermore, we look at the ava...
Article
Full-text available
The paper introduces a novel approach to the classical adaptive traffic signal control (TSC) problem. Instead of the traditional optimization or simple rule-based approach, Artificial Intelligence is applied. Reinforcement Learning is a spectacularly evolving realm of Machine Learning which owns the key features such as generalization, scalability,...
Article
Full-text available
Digital twins of road surfaces support multiple engineering applications. Remote sensing technologies provide information from the entire surface of the pavement by high accuracy point clouds. Pavement errors and differences from designed geometry can be detected and assessed using such datasets, while OpenCRG models derived from point clouds suppo...
Article
Full-text available
It is believed that autonomous vehicles will replace conventional human drive vehicles in the next decades due to the emerging autonomous driving technology, which will definitely bring a massive transformation in the road transport sector. Due to the high complexity of traffic systems, efficient traffic simulation models for the assessment of this...
Article
Full-text available
Road traffic congestion has become an everyday phenomenon in today's cities all around the world. The reason is clear: at peak hours, the road network operates at full capacity. In this way, growing traffic demand cannot be satisfied, not even with traffic-responsive signal plans. The external impacts of traffic congestion come with a serious socio...
Article
Full-text available
Many modern vehicles today are equipped with an on-board e-call system that can send information about the number of passengers in the event of an accident. However, in case of fire or other major danger in a road tunnel, it is very important for rescue services to know not only the number of passengers in a given vehicle that has an accident and c...
Article
Full-text available
In our days, simulation based development is a core element of vehicle engineering, especially considering highly automated or fully autonomous vehicles. Accordingly, the paper presents a benchmark of three different automotive simulators: PreScan, IPG CarMaker, and VTD Vires. The three software tools were applied for the same goal, namely, modelli...
Article
Full-text available
A modern, intelligens forgalomirányító rendszerek számára a közlekedési hálózat minél pontosabb valós idejű ismerete szükséges. A cikkben egy olyan módszer kerül bemutatásra, amely segítségével a detektorok nélküli útszakaszok forgalomnagysága is megbecsülhető. A cikkben két kernel módszeren alapuló megoldás kerül bemutatásra: a járműforgalom egyna...
Technical Report
Full-text available
A practical manual for Vissim-COM programming in Matlab and Python – 5th edition for Vissim version 2020 and 2021, with sample codes
Article
Full-text available
As a revolutionary technology, Connected and Automated Vehicles (CAVs) have great potential to reduce traffic collisions, increase transportation system performance, and improve environmental sustainability. This research aims to investigate the benefit or trade-off of CAVs on freeway capability, fuel consumption, and emission. To fulfil this goal,...
Article
Full-text available
In transportation modeling, after defining a road network and its origin-destination (OD) matrix, the next important question is how to assign traffic among OD-pairs. Nowadays, advanced traveler information systems (ATIS) make it possible to realize the user equilibrium solution. Simultaneously, with the advent of the Cooperative Intelligent Transp...
Conference Paper
Full-text available
The massive demand for road transportation will cause traffic congestion. This issue is especially severe when the motorway transitions to the urban road network. In view of the characteristics of the connection between urban road networks and motorway import and export, and with the aim of increasing the utilization rate of roads, alleviating road...
Article
A personalized route planner is elaborated to support commuting, where soft measures are applied to influence the intentions of individual travel behavior. In order to do that a utility function is created, which consists of four attributes (travel time, travel cost, environmental effect, and health effect) to reflect on user preferences and consid...
Article
Full-text available
Usage of simulation techniques like Vehicle-in-the-Loop, Scenario-in-the-Loop, and other mixed-reality systems are becoming inevitable in autonomous vehicle development, particularly in testing and validation. These methods rely on using digital twins, realistic representations of real vehicles, and traffic in a carefully rebuilt virtual world. Rec...
Article
Full-text available
Signal control is a basic need for urban traffic control; however, it is a very rough intervention in the free flow of traffic, which often results in queues in front of signal heads. The general goal is to reduce the delays caused, and to plan efficient traffic management on the network. For this, the exact knowledge of queue lengths on links is o...
Conference Paper
Full-text available
Considering the recent advances in autonomous driving technology, conventional on-road based testing tools cannot meet the validation requirements with respect to time and cost-efficiency. Scenario-based virtual validation methods offer an efficient virtual testing approach that supports the development and contribute to decreased on-road-testing....
Article
Road traffic monitoring at intersections is important in traffic engineering practice. Measured data together with traffic estimation represents base input information for traffic management or for road infrastructure development. Measuring turning rates is problematic in roundabouts due to their special geometry. This needs laborious manual traffi...
Conference Paper
Full-text available
The knowledge of turning rates in roundabouts is a crucial element of traffic modeling. Measuring the turning movements is often carried out by manual traffic counts (noting on paper or using handheld devices), which is a labor-intensive, therefore expensive process. The aim of this paper is the examination and comparison of different estimation me...
Article
Automation in road public transportation has been facilitated by the emergence of infocommunication and vehicle technologies. The widely accepted definitions of automation level focus solely on the driving aspects of vehicles. However, automation covers even more fields: service planning and management, vehicle and traffic control, and passenger-ha...
Article
Due to increasing issues of air pollution in urban areas continuous research is being conducted to upgrade models, which can predict the distribution of pollutants and thus enable timely interventions to mitigate their negative effects. To support these efforts, traffic data from an integrated transport model was used to drive the COPERT traffic em...
Article
Full-text available
The performance of urban road networks can be easily evaluated based on vehicle count on links; however, it is not an easy task to measure it efficiently. This paper introduces a robust filtering technique for vehicle count estimation on links at signalized intersections by applying the H-infinity filter for which the traffic model is described by...
Article
Full-text available
The paper describes a mixed reality environment for testing highly automated vehicle functions. The proposed Scenario-inthe-Loop test system connects real-time computer simulation with real elements being applicable at automotive proving ground. The paper outlines necessary hardware and software requirements and proposes basic system architecture....
Article
Full-text available
A spectacular measurement campaign was carried out on a real-world motorway stretch of Hungary with the participation of international industrial and academic partners. The measurement resulted in vehicle based and infrastructure based sensor data that will be extremely useful for future automotive R&D activities due to the available ground truth f...
Article
Full-text available
Autonomous or highly automated road vehicles and all related technologies are under intensive research and development. Moreover, internationally a massive investment increase can be observed in the automotive industry. According to this megatrend, new automotive test tracks appear or older ones transform to be capable of testing and proving for au...
Preprint
Full-text available
The paper presents the measurement campaign carried out on a real-world motorway stretch of Hungary with the participation of both industrial and academic partners from Austria and Hungary. The measurement included vehicle based as well as infrastructure based sensor data. The obtained results will be extremely useful for future automotive R&D acti...
Article
A közúti jelzések és a közlekedési infrastruktúra jelentősen befolyásolják a magasan automatizált vagy autonóm járművek viselkedését. Az automatizáltság azonban nem mindig jelent előnyt a jelenlegi köz-úti infrastruktúra vonatkozásában. Előfordulhat, hogy a magasan automatizált járművek szigorúbban betartják a közlekedési szabályokat, emiatt az önv...
Article
Full-text available
A cikkben egy olyan kevert valóságot alkalmazó keretrendszert mutatnak be, amelyben egy valós tesztjármű és több valós objektum is egyszerre kezelhető, miközben mindezek köré a virtuális valóságban virtuális forgalmat generálnak 3D megjelenítésben.
Article
Full-text available
Road traffic signals and traffic infrastructure have a significant impact on the behaviour of highly automated or autonomous vehicles. However, the increase in automation does not always mean an advantage. Generally, highly automated vehicles strictly follow the traffic rules resulting in near-accident situations, although their goal is to avoid an...
Article
Full-text available
Highly automated and autonomous vehicles become more and more widespread changing the classical way of testing and validation. Traditionally, the automotive industry has pursued testing rather in real-world or in pure virtual simulation environments. As a new possibility, mixed-reality testing has also appeared enabling an efficient combination of...
Article
Full-text available
The paper proposes an eco-cruise control strategy for urban public transport buses. The aim of the velocity control is ensuring timetable adherence, while considering upstream queue lengths at traffic lights in a probabilistic way. The contribution of the paper is twofold. First, the shockwave profile model (SPM) is extended to capture the stochast...
Technical Report
Full-text available
Vissim is a microscopic road traffic simulator based on the individual behavior of vehicles. The goal of the microscopic modeling approach is the accurate description of the traffic dynamics. Thus, the simulated traffic network may be analyzed in detail. The simulator uses the so-called psycho-physical driver behavior model developed originally by...
Code
MANUAL IS HERE: http://kjit.bme.hu/index.php/en/kutatas-traffic-en/sumotraci-en
Code
MANUAL IS HERE: http://kjit.bme.hu/index.php/en/kutatas-traffic-en/sumotraci-en
Conference Paper
Full-text available
Developing a vehicle is always a long and complex task. This is especially true for autonomous cars. Tasks performed by the driver are taken over by the vehicle and must be performed with maximum reliability. Developing these systems is a difficult task, especially due to limited testing capabilities. Testing a vehicle in a closed environment is sa...
Article
Full-text available
A közúti közlekedési torlódások mára gyakorlatilag mindennapossá váltak a nagyvárosok útjain a világ minden táján. A jelenség magyarázata egyértelmű: a közlekedési hálózatok kapacitása csúcsidőben telítődik, így a fokozódó igények nem szolgálhatók ki megfelelően még akkor sem, ha pl. forgalomfüggő jelzőlámpás irányítás működik. Mindezek eredményeké...
Article
The paper presents modeling, control and analysis of an urban public transport network. First, a centralized system description is given, built up from the dynamics of individual buses and bus stops. Aiming to minimize three conflicting goals (equidistant headways, timetable adherence, and minimizing passenger waiting times), a reference tracking m...
Article
A cikk tárgya az országos közúthálózat forgalmi menedzsmentjéhez szükséges valós idejű információk számbavétele, azok fellelhetőségének feltérképezése; összességében a Nemzeti Útdíjfizetési Szolgáltató Zrt. (NÚSZ) alapvetően útdíjfizetési célú adatai – a jogszabályok adta adatkezelési lehetőségek keretein belül történő – újrahasznosíthatóságának mé...
Experiment Findings
We created a co-simulation example for using Sumo and Unity 3D in a synchronized manner. An example code is provided via GitHub: https://github.com/BMEAutomatedDrive/SUMO-Unity3D-connection This demonstrates real-time communication between the microscopic traffic simulator SUMO and the 3D game engine Unity 3D with Python 3.7 based TCP/IP server.
Article
Full-text available
In order to provide optimal choice of activity locations and travel time reduction, a daily activity chain optimization method has been elaborated, which includes temporal and spatial flexibility of the activities. In the course of the optimization process, possible alternatives are searched using a modified version of the Traveling Salesman Proble...
Conference Paper
The paper presents a novel simulation concept for autonomous and highly automated road vehicles, called Scenario-in-the-Loop (SciL) testing. SciL can contribute to a more efficient development, testing and validation of driverless cars, which is a pressing question of our days. SciL based testing introduces a new approach capable to simulate and co...
Conference Paper
Full-text available
As autonomous and driver assistance functions become more and more complex, novel testing method-ologies are required. Introduction of highly automated and autonomous vehicles on public roads alters traffic flow dynamics. Therefore, it is not enough to test only the single vehicle itself, but it will also be required to test its interaction with th...
Conference Paper
Full-text available
In order to have a well-established Intelligent Transportation System, it is essential to have real-time traffic data across the network. The growing adoption of smart mobility technologies led to an even greater need for monitoring all road links in a network. However, placing more sensors could represent a more complete set of information, instal...
Article
For an urban bus network to operate efficiently, conflicting objectives have to be considered: providing sufficient service quality while keeping energy consumption low. The paper focuses on energy efficient operation of bus lines, where bus stops are densely placed, and buses operate frequently with possibility of bunching. The proposed decentrali...
Article
Full-text available
The paper presents a novel concept for traffic signal controller. Instead of the traditional central architecture, a wireless operation with distributed control architecture is proposed for traffic light control. The concept rests on local control units distributed in space as well, i.e. the signal heads also have own control logic. The basis of sa...
Article
Full-text available
Urban commuters have been suffering from traffic congestion for a long time. In order to avoid or mitigate the congestion effect, it is significant to know how the introduction of autonomous vehicles (AVs) influence the road capacity . The effects that AVs bring to the macroscopic fundamental diagram (MFD) were investigated through microscopic traf...
Article
Full-text available
A közlekedésben ismert és elfogadott automatizálási szintek elsősorban a járműirányításra fókuszálnak. Ugyanakkor a mobilitási szolgáltatások tervezése és használata is hatékonyabbá, illetve kényelmesebbé tehető az automatizálással. A mobilitási szolgáltatások automatizáltsági jellemzőit komplex módon leíró értékelő módszer a szolgáltatás tervezési...
Article
Full-text available
Traffic control of urban areas is a current research topic. Different pricing regimes such as cordon pricing, time‐based average cost zone pricing, distance‐based average cost zone pricing or marginal cost zone pricing have been investigated so far. The economical best solution, however, cannot be used due to the lack of information. In the study,...
Conference Paper
Real-time monitoring of road traffic variables is essential for any effective control strategy in Intelligent Transportation Systems. Network-wide monitoring has increased importance in the current and future panorama due to the verge of adoption of smart mobility technologies, i.e. monitoring all links in a network is a general desired goal. Howev...
Article
Full-text available
The main goal of this paper is to determine the achievable network capacity increases, through utilization of vehicles with Automated Driving Systems. The SUMO microscopic traffic simulator was the chosen tool for this, as it is capable of simulating individual vehicles traveling on any given network. Influence over the parameters of vehicles, netw...
Article
Full-text available
As highly automated and autonomous vehicles (AVs) become more and more widespread, inducing the change of traffic dynamics, significant changes occur in traditional traffic control. So far, automotive testing has been done mostly in real-world or pure virtual simulation environment. However, this practice is quite obsolete as testing in real traffi...
Book
https://mersz.hu/tettamanti-luspay-varga-road-traffic-modeling-and-simulation
Article
Nowadays transportation represents an important field for CPS applications due to the rapid development of highly automated or autonomous vehicles, e.g. warehouse vehicles, airport people movers, public transport, etc. These vehicles are usually designed to circulate on fixed routes independently of the actual state of the network in order to fulfi...
Conference Paper
Full-text available
In our days, vehicle automation is in a continuous evolutionary phase consisting of experiments, testing and validation. Accelerating the development and deployment of autonomous vehicles and infrastructure is a real demand as these technologies have a great potential to improve traffic safety and resolve road transport problems. The Vehicle-In-the...
Article
This paper presents a model-based multiobjective control strategy to reduce bus bunching and hence improve public transport reliability. Our goal is twofold. First, we define a proper model, consisting of multiple static and dynamic components. Bus-following model captures the longitudinal dynamics taking into account the interaction with the surro...