Track properties for formation of pick-up trains

U ovom radu razmatran je problem kolosijeka za formiranje sabirnih vlakova s analizom I prijedlogom mogucih rješenja. Predložena rješenja zasnovana su na rezultatima provedenih simulacija ciju osnovu predstavljaju podaci dobiveni iz ranžirnih kolodvora Beograd i Lapovo. Procesi koji se realiziraju u tim kolodvorima pokazali su se diskretnim sa stohastickim elementima te su i simulacijski modeli izabrani za rješavanje ovog problema prilagođeni istom, primjenjivi i ucinkoviti. Dobiveni rezultati pokazuju da dosadašnja praksa rješavanja ovog problema nije bila dobra, da ne daje dobre rezultate i da je treba mijenjati.The problem of tracks for formation of pick-up trains, with the analysis and proposal of possible solutions, is considered in the paper. Proposed solutions are derived from the results of simulations, which are based on the information obtained from the Belgrade and Lapovo marshalling yards. it was established that processes realized in these train stations are discrete with stochastic elements, and so the simulation models selected for solving this problem have been adapted accordingly, and have proven to be implementable and efficient. The results obtained show that the current practice in solving this issue has not been appropriate, that it does not provide good results and, hence, that it has to be changed