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Cycloidal (also called epicyclical or convex-concave) gears are used less often than common involute gears, which are very easy to manufacture and can be modified by corrections to the gear profile. Cycloidal gears are very sensitive to the proper axial distance between the pinion and the gear. The main advantage of convex-concave gears is the lowering of the contact pressure due to teeth flanks meshing and also the lowering of the slide ratios compared to involute gears. The calculation of the selected geometrical parameters and the contact pressure between the teeth flanks of the cycloidal gearing is described in the presented article.

Physical modelling of transportation system is helpful for finding information about the power flow in particular transmission elements. The vehicle power train model can be built from predefined blocks. The blocks are based on mathematical equations, which define every power train element. The procedure of the particular transmission element - a two-stage epicyclic gearbox model creation and calculation is described in the presented article.

The article presents the possibilities of an integrated transport system modeling simulating the complexity of regional transportation and its effects. The modeling methods deal with individual behavioral units and proceed through several steps to estimate travel.

The aim of the presented article is to show the possibilities of vehicle tire mathematical model creation and present simulations of a typical driving manoeuvre of a vehicle model equipped with variant tire models.

This article discusses the possibility of the application of the NFC technology as a system of selling tickets in public transport. The NFC (Near Field Communication) technology is a wireless and contactless technology of transmission of radio data over short distances (max. 5 cm).

This paper presents a statistical analyses which was performed for actual data associated with unit material costs of repairs of vehicles operated by the Polish Mail branch in Lublin in the period of three consecutive years. Conducted analyses allowed to determine the parameter values of prepared model of vehicles operating efficiency for considered transport system.

The aim of the presented article is to show how to create a mathematical model of the tension mechanism working by a spring motion generation and contacting a rigid body at the end of the motion.

The article outlines the methodology of statistical analysis of failure rate of active safety systems in buses. The theoretical discussion is illustrated with calculations carried out on the basis of empirical data covering a four-year period of operation of selected models of buses at the Motor Transport Company "Wschod" plc in Lublin (Poland). It was found that the distribution of distances travelled by the analyzed vehicles between successive repairs can be approximated by an exponential distribution

This paper presents correlation analyses of real-life data associated with the intensity of use of vehicles and the costs of replacement of operating materials and components performed in a three-year period for delivery vans, which was operated by the Poczta Polska (Polish Mail) delivery office in Lublin.

This paper presents the next results of the statistical analysis of the operating parameters of numbers of vehicle, which was operated by the Poczta Polska (Polish Mail) delivery office in Lublin. The calculations were based on data from service in the years 2008–2010.

This paper presents results of the statistical analysis of the operating parameters of a vehicle population, which was operated by the Polish Mail delivery office in Lublin. The calculations were based on data from service in 2009.

This paper presents a draw up model for the assessment of the economic effectiveness of vehicle transport services. On the basis of this model, computer calculations have been made, the selected results of which are presented and discussed on in this article.