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SUMMARY:Quasi-dynamic o-d flow estimation from traffic counts: results and
  research prospects
DTSTART:20150327T121500
DTEND:20150327T131500
DTSTAMP:20260413T152852Z
UID:c70212cd9d0730758ca897e0aa94e453edfee536202c2b217d776d21
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Vittorio Marzano\, assistant professor\, University o
 f Napoli\, Italy\nProf. Dr Andrea Papola\, associate professor\, Universit
 y of Napoli\, Italy\nThe seminar reports on research results and prospects
  on origin-destination (o-d) flows estimation based on traffic counts.\nAc
 knowledging that a satisfactory OD flow updating (regardless of the qualit
 y of the prior estimate) can be obtained generally only when the ratio bet
 ween the number of equations (i.e. independent observed link flows) and th
 e number of unknowns (i.e. OD flows) is close to one\, a quasi-dynamic GLS
  o-d flow estimator from traffic count is presented\, under the assumption
  that o-d shares are constant across a reference period\, whilst total flo
 ws leaving each origin vary for each sub-period within the reference perio
 d. The advantage of this approach over conventional within-day dynamic est
 imators is that of reducing drastically the number of unknowns given the s
 ame set of observed time-varying traffic counts. The realism of the quasi-
 dynamic assumption\, and the theoretical and operational properties of the
  proposed QD-GLS estimator are discussed and tested on the real test site 
 of A4-A23 motorways in North-Eastern Italy.\nTwo concerned research prospe
 cts are discussed also: the former is the formulation of non-linear quasi-
 dynamic Kalman filters (QD-KF)\, embedding diverse specifications of the s
 tate variables and of the corresponding transition and measurement equatio
 ns\, with promising results on synthetic networks. The latter deals with a
  different approach for balancing unknowns and equations\, that is proposi
 ng an optimal joint approach for zoning and o-d flow estimation/updating\,
  i.e. achieving an effective trade-off between approximation in network lo
 ading pattern and effectiveness in o-d flow estimation.\nBios :\nVittorio 
 Marzano is assistant professor at the University of Napoli\, visiting rese
 archer at the Singapore University of Technology and Design (SUTD)\, exter
 nal collaborator of the SUTD-I3 innovation centre and affiliate with the S
 ingapore-MIT Alliance for Research and Technology (SMART-MIT) and the ITS 
 lab at MIT Boston. He holds a PhD in Transport Engineering from the Univer
 sity of Napoli (2006)\, a MPhil in Transport systems planning and manageme
 nt (2003) and an executive course in Supply chain management and distribut
 ive logistics from the Business School of the Politecnico di Milano (2010)
 . His research interests cover various topics of transport engineering: fr
 eight modelling\, discrete choice modelling\, o-d flow estimation/updating
 \, network sensors location\, traffic assignment\, ITS. He is referee for 
 top international journals and peer-reviewed projects. He is involved in t
 eaching activity for undergraduate and postgraduate courses and masters in
  Italy and abroad. He has an extensive track record of management of inter
 national research projects\, and he has also joined more than 20 national/
 international research projects in quality of senior researcher. He has al
 so a considerable consultancy experience in the sectors of freight and log
 istics\, public transport\, high-speed railways\, feasibility studies of i
 nfrastructures and transport services in Italy and abroad.\nAndrea Papola 
 is associate professor of Methods and applications for transport system en
 gineering at the University of Napoli “Federico II”. He holds a Ph.D. 
 in Transport Engineering from the University of Napoli\, past positions in
 clude a research fellowship at the National Research Council (1998-2001). 
 His research interests\, developed in more than 20 years of experience\, i
 nclude models and methods for simulating passenger and freight transport s
 ystems\, advanced discrete choice models (especially for route choice)\, m
 ethods for effective o-d matrix estimation/updating\, survey design and mo
 del estimation on the basis of RP/SP data. He has published 18 top journal
  papers\, 7 chapters in international books and more than 40 conference pr
 oceedings\, with an h-index of 7 and around 200 citations. He is member of
  the Editorial Advisory Board of Transportation Research Part B and was fo
 rmer member of the scientific committee of the European Transport Conferen
 ce. He has a proven track record of undergraduate and postgraduate taught 
 courses in national and international contexts. He has been invited to giv
 e presentations in several national and international universities. He was
  principal investigator in several EU and Italian funded projects. He has 
 been in charge of implementing several decision support systems related to
  both passenger and freight transport systems\, both at a national and reg
 ional level. He also carried out several feasibility studies for new infra
 structures and services appraisal.
LOCATION:GC B3 30 http://plan.epfl.ch/?lang=fr&room=GCB330
STATUS:CONFIRMED
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