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CONAT 2016 international congress of automotive and transport engineering
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Anghel Chiru · Nicolae Ispas Editors
CONAT 2016
International Congress
of Automotive and
Transport Engineering
CONAT 2016 International Congress of Automotive
and Transport Engineering
Anghel Chiru • Nicolae Ispas
Editors
CONAT 2016 International
Congress of Automotive
and Transport Engineering
123
Editors
Anghel Chiru
Department of Automotive
and Transportation Engineering
Transilvania University of Brasov
Brasov
Romania
Nicolae Ispas
Department of Automotive
and Transportation Engineering
Transilvania University of Brasov
Brasov
Romania
ISBN 978-3-319-45446-7 ISBN 978-3-319-45447-4 (eBook)
DOI 10.1007/978-3-319-45447-4
Library of Congress Control Number: 2016953012
© Springer International Publishing Switzerland 2017
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Printed on acid-free paper
This Springer imprint is published by Springer Nature
The registered company is Springer International Publishing AG Switzerland
Preface
In the field of creation, manufacturing and testing of modern automobiles are manifested demands and requirements, sometimes contradictory, related to: security, aerodynamics, design, energy efficiency, comfort, noise, vibrations, entertainment, respect
for the environment, reliability, preservation of resources, technological optimization,
costs and recycling. The automotive industry is characterized, on the other hand, by a
strong competition in inventiveness and high technology products. Rapid and largescale evolution is dependent on the capacity of the research and design departments
of the manufacturing companies to assimilate and work with innovative engineering
methods. Numeric simulation represents one of the effective environment that support
the activities related to:
– New materials engineering
– Product–process interdependency
– Development of future automotive concepts: hybrids, autonomous and
interconnected
– Virtual reality: simulation, optimization of process management
– Topological and technological optimization
– Cost efficiency of research and development.
Introduction of RDE (Real Driving Emissions) measure starting from September
2017 for Euro 6c (new models) and Euro 7 (starting with January 2020) is a new
challenge for large automotive manufacturers. The advancement in internal combustion
engines and electronic systems used in control and analysis constitutes guaranties for
future solutions for treating and filtering the noxious and particulate emissions.
To respond to the major challenges faced by the automotive world, the authors
of the papers presented in the technical sections of CONAT 2016 International Congress offer their vision and solutions in the following areas:
– Advanced Engineering Methods
– Innovative Solution for Motor Vehicles
– Heavy and Special Vehicles
– Automobile and Environment
– New Materials, Manufacturing Technologies and Logistics
– Advanced Transport Systems and Road Traffic
– Accident Research and Analysis.
The presented papers were selected from 222 proposals submitted. All papers were
developed by 218 specialists from 14 countries. Assessment and systematization of
presentations were performed by an international scientific committee. They were
analyzed for the novelty and scientific content, as well as for the layout of each paper,
following the requirements imposed by FISITA, SIAR, SAE International and Springer
Publishing.
The initiation, implementation and completion of activities for preparing, collecting
and finalizing of the volume containing the Proceedings of CONAT 2016 Congress
were possible, thanks to the involvement and professionalism of Dr. Dinu Covaciu, the
Coordinator of the Technical Programme of Congress. We thank him for all his efforts.
We also express our gratitude to our colleagues from Transilvania University, and to
the members of the scientific committee and reviewers, to organizers and partners from
the companies Schaeffler, Renault Romania, Atlassib, Horiba, AVL, Tedata and
Brahms, for their support and involvement in all activities of organization of the XIIth
edition of the International Congress of Automotive and Transport Engineering
CONAT 2016.
Anghel Chiru
President of the CONAT 2016 Scientific Committee
Nicolae Ispas
President of the CONAT 2016 Organizing Committee
VI Preface
Scientific Committee
President of the Scientific Committee
Anghel Chiru Transilvania University of Brasov, Romania
Coordinators of the Congress Sections
Ion Preda Advanced Engineering Methods
Transilvania University of Brasov, Romania
Gheorghe Al. Radu Innovative Solution for Motor Vehicles
Transilvania University of Brasov, Romania
Mircea Năstăsoiu Heavy and Special Vehicles
Transilvania University of Brasov, Romania
Corneliu Cofaru Automobile and Environment
Transilvania University of Brasov, Romania
Gheorghe Mogan New Materials, Technologies and Logistics
Transilvania University of Brasov, Romania
Daniela Florea Advanced Transport Systems and Road Traffic
Transilvania University of Brasov, Romania
Nicolae Ispas Accident Research and Analysis
Transilvania University of Brasov, Romania
Scientific Committee Members
Cristian Andreescu University Politehnica Bucharest, Romania
Michael Butsch University of Applied Sciences Konstanz, Germany
Kwang Min Chun Yonsei University, Korea
Giovanni Cipolla Politecnico di Torino, Italy
Michael Elicker Schaeffler Technologies AG & Co. KG, Germany
Nicolae Filip Technical University of Cluj-Napoca, Romania
Eduard
Golovatai-Schmidt
Schaeffler Technologies AG & Co. KG, Germany
Paul Guempel University of Applied Science Konstanz, Germany
Peter Kuchar University of Applied Science Konstanz, Germany
Jan Leuridan Siemens Industry Software, Belgium
Abdellatif Miraoui Cadi Ayyad University, Morocco
Eugen Mihai Negrus University Politehnica Bucharest, Romania
Hariton Poparad Transilvania University of Brasov, Romania
Serban Raicu University Politehnica Bucharest, Romania
Adrian Rienaecker University of Kassel, Germany
Corina Sandu Virginia Tech, USA
Adolfo Senatore Federico II University of Naples, Italy
Roger Sierens Ghent University, Belgium
Cornel Stan West Saxon University of Zwickau, Germany
Ion Tabacu University of Pitesti, Romania
Jan Unarski Institute of Forensic Research Krakow, Poland
Nicolae Vasiliu University Politehnica Bucharest, Romania
Ion Visa Transilvania University of Brasov, Romania
Beside the members of the Scientific Committee listed here, the papers were reviewed
by a total number of 73 reviewers from academic institution, research centers and
industry.
Definitions, Acronyms, Abbreviations
Al Aluminum
CAD Computer-aided design
CAE Computer-aided analysis
CG Center of gravity
CGAP Gap element connection
CI Cast iron
CM Cross member
CMVR Central Motor Vehicle Rules
CVD Complete vehicle development
FEA Finite element analysis
Fig. Figure
FOS Factor of safety
FUPD Front under run protection device
Govt. Government
GVW Gross vehicle weight
HD Heavy duty
LH Left hand
NINC Number of increments
NLPARM Nonlinear parameter
PDD Product design and development
PGAP Gap element property specification
RH Right hand
RLDA Road load data acquisition
RPM Revolution per minute
RUPD Rear under run protection device
SPC Single point constraint
T Ton
TM Transmission housing
UPD Under run protection device
VECV Volvo Eicher Commercial Vehicle
VIII Scientific Committee
Contents
Advanced Engineering Methods
Novel Simulation Methodology for the Estimation of the Flow Mark Risk
Associated with the Injection of Mass Colored Plastic Materials . . . . . . . . . . 3
Alexandru Ioan Ciobanas
Numerical and Experimental Investigations of a Twin Sheet Thermoplastic
Structure with Rectangular Frusta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Stefan Tabacu, Claudiu Diaconescu, and Alexandru Oltean
Expanded Polypropylene Finite Elements Analysis in Transport
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Alexander Schwarz, Catalin-Andrei Runcianu, and Andreas Gebhardt
Functional Description and Design Aspects of Hybrid Transmissions. . . . . . . 36
Martin Vornehm
Comparative Study on the Performances of Aerodynamic Devices Used
in Decreasing of the Automobiles Lift Force . . . . . . . . . . . . . . . . . . . . . . . 48
Angel Huminic, Gabriela Huminic, Marius Carauleanu,
and Constantin Ciolofan
Analysis of the Influence of the Drive Force Distribution Between Axles
on an Automobile Stability in Its Curvilinear Motion. . . . . . . . . . . . . . . . . . 55
Andrzej Reński
About the Steering Kinematics of the Road Trains . . . . . . . . . . . . . . . . . . . 64
Ion Preda and Dinu Covaciu
Evaluation by Experimental Methods of the Parameters that Influence
the Behavior of Various Passenger Cars Classes in the Braking Process. . . . . 75
Adrian Todoruţ, Nicolae Cordoș, István Barabás, and Sorin Miheț
Evaluation of the Behavior in Cornering for Different Classes of Passenger
Cars by Numerical Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Nicolae Cordoș, Adrian Todoruţ, István Barabás,
and Radu Daniel Mureșan
Structural Dynamic Applications Using Principal Component Analysis
Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Mircea Niculescu, Cristi Irimia, Ioan Calin Rosca, Mihail Grovu,
and Maria Violeta Guiman
Weight Optimization of Existing Transmission Housing for Heavy Duty
Commercial Vehicles Using Correlated Simulation and Experimental Tools . . . 100
Kandreegula Suresh Kumar and Dheeraj Kumar Singh
New Approaches in Designing a Race Car Chassis for an Engineering
Competition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Doru Ionut Furnea and Silviu Butnariu
Presentation of Tests with a Dynamometer Related to the Determination
of Fuel Consumption in the NEDC and WLTC Driving Cycles and as Well
Related to the Dynamic Behavior of Vehicles. . . . . . . . . . . . . . . . . . . . . . . 120
Michael Butsch and Valerio Rescigno
Validation Procedure for Worldwide Harmonized Light Vehicles Test
Cycle via Hardware in the Loop - Real Time Testing . . . . . . . . . . . . . . . . . 128
Bogdan Ovidiu Varga, Nicolae Burnete, and Calin Iclodean
Experimental Investigation of a Vehicle Behavior Using Different Complex
Data Acquisition Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Ilie Dumitru, Racila Laurentiu, Tutunea Dragos, Matei Lucian,
Dima Alexandru, and Oprica Alexandru
Validation of Kinematic Simulation of Sprocket Contacts of Chain Links
by Experiments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Karim Shalaby, Florin Corciova, and Simona Lache
Belt Losses Evaluation for a Push-Belt CVT . . . . . . . . . . . . . . . . . . . . . . . 152
Valerian Croitorescu, Codrin Cuciurean, and Mircea Oprean
Kinematic and Dynamic Study of a Mechanism for a Vehicle Front
and Rear Stabilizer Bars. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Nicolae Dumitru, Cristian Copilusi, Ionut Geonea,
and Alexandru Margine
Methods for Modeling an Elastic System with Permanent Contour Coupling
Deformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Hariton Poparad
Reinvestigation of the Electromagnetic Valve Train (EMVT) Technology
via Multidomain Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Christian Trebehs and Doru Groza
Study on Mixture Formation at an Experimental Spark Ignition Engine . . . . . 187
Dan Mihai Dogariu, Anghel Chiru, Stelian Țârulescu, Marius Lazăr,
and Vlad Ștefan Stancu
X Contents
Aspects Concerning Modeling of Combustion for Compression Ignition
Engine with Injection Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Dan Mihai Dogariu, Anghel Chiru, Stelian Țârulescu, and Marius Lazăr
Comparative Study on the Performances of the One-Way Hydraulic Valves . . . 203
Marius Lazăr, Anghel Chiru, and Dan Mihai Dogariu
Estimation of Boiling Points of Brake Fluids . . . . . . . . . . . . . . . . . . . . . . . 209
István Barabás, Adrian Todoruț, and Nicolae Cordoș
Modelling and Optimization of Constructive Form for GO-NOGO Exterior
and Interior Diameter Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Iulian Alexandru Orzan and Constantin Buzatu
Systems Engineering Requires Digital Twins of Machine Elements . . . . . . . . 227
Willi Theodor Gruender
Collaborative Design and Use of Interactive Simulations: Boost
the Learning Environment in Road Vehicle Dynamics Curriculum . . . . . . . . 234
Moein Mehrtash and Dan Centea
Experimental Researches on the Magneto-Rheological Dampers Response
to the Control Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Alexandru Dobre, Nicolae Vasiliu, and Cristian Nicolae Andreescu
Innovative Solution for Motor Vehicles
Contributions in Experimental Research Concerning Diesel Fuel Supply
and Lubrication in the Case of Comparative Study Between Euro V and IV
Common Rail Engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Doru Baldean, Mihai Aurel Crișan, and Adela Ioana Borzan
Experimental Research Regarding the Possibility of Biofuel Fumigation
Supply Method on a Single Cylinder Compression Ignited Engine . . . . . . . . 264
Doru Baldean, Nicolae Vlad Burnete, Dan Moldovanu, Ferenc Gaspar,
Adela Ioana Borzan, and Mihai Aurel Crișan
Study on a Stratified Charge Spark Ignition Automotive Engine . . . . . . . . . . 274
Edward Rakosi, Sorinel Talif, Gheorghe Manolache,
and Adrian Sachelarie
Researches on Cooling Air Flow Control Devices Using on Cars
with Internal Combustion Engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Spiridon-Cristian-Dan Dăscălescu, Marius Receanu,
Laurenţiu Dimitriu, and Liliana Vornicu-Albu
Modeling the Energy Evaluation for an Electric Machine . . . . . . . . . . . . . . . 295
Valerian Croitorescu and Alexandru Manta
Contents XI
Balancing of a Single Stage Reciprocating Compressor with Elastic
Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Doru Groza, Ioan Călin Roșca, and Gheorghe Alexandru Radu
The Calculation Algorithm for the Determination of the Temperature
at the End of the Intake Stroke for GDI Engines. . . . . . . . . . . . . . . . . . . . . 311
Tudor Mitran, Vasile Blaga, Sorin Moca, George Dragomir,
and Dinu Fodor
Diagnosing the Operation of a Locomotive Diesel Engine Based on the
Analysis of Used Oil in the Period Between Two Technical Revisions . . . . . 319
Cătălin V. Zaharia, Rodica Niculescu, Victor Iorga, Cătălin Ducu,
Adrian Clenci, and Bogdan Aron
Heavy and Special Vehicles
Simultaneous Influences of Tyre Pressure and Steering Geometry upon the
Theoretical Speed Ratio in the Running Gear System of Four-Wheel Drive
Tractors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Mircea Nastasoiu and Nicolae Ispas
Analysis of the Comfort of the Seats Used in Light Military Vehicles . . . . . . 339
Marian Mitroi and Anghel Chiru
Aspects Regarding the Kinematic Optimization of a Tracked Military
Vehicle’s Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Octavian Alexa, Radu Vilău, Ovidiu-Constantin Ilie, Daniela Voicu,
and Marin Marinescu
Automobile and Environment
Research on Gasoline Homogenous Charge Compression Ignition (HCCI)
Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Corneliu Cofaru
Study of the Diesel Engine Cycle Variability at LPG Fuelling . . . . . . . . . . . 371
Liviu Nemoianu, Alexandru Cernat, Constantin Pana,
Niculae Negurescu, and Cristian Nutu
Direct Injection of Diesel and Ethanol in a Diesel Engine - A Numerical
Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Nicolae Vlad Burnete, Călin Iclodean, Dan Moldovanu,
and Nicolae Filip
XII Contents
The Effects of a Diesel-Ethanol Blend Without Additives on Diesel Engine
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387
Nicolae Vlad Burnete, Călin Iclodean, George Popescu,
and Nicolae Filip
The Influence of Biodiesel on Engine Combustion and CO2 Emissions . . . . . 395
Bogdan Cornel Benea
Modeling the Performances of a Vehicle Provided with a Spark Ignition
Engine Using a Double Energy Source, Gasoline and Liquefied
Petroleum Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
Valentin Nişulescu, Florian Ivan, Gheorghe Fratila,
and Gheorghe Banca
Modeling the Performances of a Vehicle Provided with a Hybrid Electric
Diesel Propulsion System (HEVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Gheorghe Bancă, Florian Ivan, Gheorghe Frățilă,
and Valentin Nișulescu
Aspects of Experimental Research on Hydrogen Fuelled Automotive Diesel
Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427
Ionel Mirica, Alexandru Cernat, Constantin Pana, Niculae Negurescu,
and Cristian Nutu
Researches on Combustion Quality for a Single Cylinder Diesel Engine . . . . 435
Stelian Tarulescu and Radu Tarulescu
Urban Transportation Solutions for the CO2 Emissions Reduction
Contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442
Stelian Tarulescu and Radu Tarulescu
Mission CO2 Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451
Roland Seebacher
Experimental Research Concerning the Influence of the Electrochemical
Reactions Induced by Products of an Electrolytic Cell Over the Emission
Pollutants in ICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462
Marius Nicolae Moldoveanu, Cheng Lin Tang, and Cornel Aramă
Energy-Based Approach to Model a Hybrid Electric Vehicle and Design
Its Powertrain Controller and Energy Management Strategy . . . . . . . . . . . . . 471
Nicole Salloum, Serge Francis, and Charbel Mansour
Dynamic Control of an Electric Vehicle with Traction Induction Motor . . . . . 482
Marius Constantin Georgescu
Contents XIII
A Propulsion System for Means of Transport with Non-autonomous
Electrical Traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
Tudor Mitran, Nicolae Chioreanu, Catalin Chioreanu, Alexandru Rus,
and Horia Beles
Validation of a Human-and-Hardware-in-the-Loop Control Algorithm
Using Real Time Simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497
Ionut Alexandru Stoica, Marius Valentin Bataus,
and Ioan Mircea Oprean
Electronic Control Systems of E-Smart Vehicle. . . . . . . . . . . . . . . . . . . . . . 509
Radu Tarulescu and Stelian Tarulescu
Battery Management System of E-Smart Vehicle . . . . . . . . . . . . . . . . . . . . 517
Radu Tarulescu and Stelian Tarulescu
New Materials, Manufacturing Technologies and Logistics
Worldwide Diversity Management of “Global Access” Renault/Dacia’s
Vehicle Range by Using a Modern PLM System . . . . . . . . . . . . . . . . . . . . 527
Bogdan Bădescu and Pascal Candau
Potential Capabilities of Shape Memory Driven Automotive Devices. . . . . . . 536
Joachim Strittmatter, Paul Gümpel, and Oskar Lattner
Applicability of Composite Forming Technologies for Automotive
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547
Lucian Rad and Anghel Chiru
Constructive Optimization of Composite Materials Automotive
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556
Anghel Chiru and Lucian Rad
The Evaluation of Rheological Properties of Composites Reinforced
with Hemp, Subjected to Photo and Thermal Degradation . . . . . . . . . . . . . . 565
Mariana Domnica Stanciu, Ioan Curtu, Mihai Groza, and Adriana Savin
Optimization of the Plastic Injection Molding Parameters by Using the
Taguchi Method to Prevent Jammed Components in the Assembly Process
of Mechatronic Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575
Ion Cristian Braga and Anisor Nedelcu
Key Characteristics of the World Class Manufacturing Concept
in the Production of Chassis for Buses Industry . . . . . . . . . . . . . . . . . . . . . 585
Luminiţa Ştirbu, Cosmin Știrbu, Nadia Belu, and Viorel Nicolae
XIV Contents
Advanced Automotive Assembly Line Trends as Tools in Optimizing
Production Line Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592
Hariton Poparad
Cleaning Methods for Flux Pollution Measurement in Automotive Coolant
Loop Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 599
Hervé Bourgeais and Claire Demarcq
Design and Development of Chassis Along with Novel Under Run
Protection Devices for Commercial Vehicles with the Use of an Innovative
Approach Resulting in Lighter Weight of the Vehicle . . . . . . . . . . . . . . . . . 610
Ashesh Anil Shah and Himanshu Arora
The Quality Management Principles and Their Incidence Within ISO 9001:
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620
Laurentiu Aurel Mihail
Product Quality Control Optimization for Selection of Measurement
and Control Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629
Constantin Buzatu and Iulian Alexandru Orzan
Improvement of the 8D Analysis Through a System Based on the “Internet
of Things” Concept Applied in Automotive Industry . . . . . . . . . . . . . . . . . . 635
Viorel Nicolae, Laurenţiu Mihai Ionescu, Nadia Belu,
and Știrbu Luminița Elena
A Case Study Regarding the Implementation of Six Sigma in an Assembly
Process for the Automotive Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 643
Dorin-Ion Dumitrascu, Adela-Eliza Dumitrascu, and Anghel Chiru
Advanced Transport Systems and Road Traffic
Analysis of the Influence of One-Way Streets on the Urban Road Networks
Connectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 653
Daniela Florea, Dinu Covaciu, and Janos Timar
Cooperative Smart Intersection as an Enabler of Advanced Traffic
Management Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668
Laura Coconea, Gonzalo Alcaraz, and Renato Augusto Lira de Andrade
Bus Routing Safety for the Transportation of Children to School . . . . . . . . . 676
Eleni Chalkia, Jose Maria Salanova Grau, Evangelos Bekiaris,
Georgia Ayfandopoulou, Chiara Ferarini, and Evangelos Mitsakis
Improving the Road Traffic Regulation in the Area of Roundabout
Intersections Function of the Traffic Streams Size . . . . . . . . . . . . . . . . . . . . 684
Elena Neagu, Andrei Alexandru Boroiu, Ionel Vieru,
and Alexandru Boroiu
Contents XV