Parameter and density estimation from real-world traffic data: A kinetic compartmental approach

Pereira, Mike,1992Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences (författare)

The main motivation of this work is to assess the validity of a LWR traffic flow model to model measurements obtained from trajectory data, and propose extensions of this model to improve it. A formulation for a discrete dynamical system is proposed aiming at reproducing the evolution in time of the density of vehicles along a road, as observed in the measurements. This system is formulated as a chemical reaction network where road cells are interpreted as compartments, the transfer of vehicles from one cell to the other is seen as a chemical reaction between adjacent compartment and the density of vehicles is seen as a concentration of reactant. Several degrees of flexibility on the parameters of this system, which basically consist of the reaction rates between the compartments, can be considered: a constant value or a function depending on time and/or space. Density measurements coming from trajectory data are then interpreted as observations of the states of this system at consecutive times. Optimal reaction rates for the system are then obtained by minimizing the discrepancy between the output of the system and the state measurements. This approach was tested both on simulated and real data, proved successful in recreating the complexity of traffic flows despite the assumptions on the flux-density relation.

Boyraz Baykas, Pinar,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)baykas (författare)
Kulcsár, Balázs Adam,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kulcsar (författare)
Lang, Annika,1980Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences(Swepub:gu)xlanap (författare)
Göteborgs universitetInstitutionen för matematiska vetenskaper (creator_code:org_t)

Ingår i:Transportation Research Part B: Methodological: Elsevier BV155, s. 210-2390191-2615

Av författaren/redakt...: Pereira, Mike, 1 ...; Boyraz Baykas, P ...; Kulcsár, Balázs ...; Lang, Annika, 19 ...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Samhällsbyggnads ...; och Transportteknik ...

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Elektroteknik oc ...; och Reglerteknik

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