Davor Sumpor

Analysis of the Possible Savings of Cycle Time on Tram Line No. 17 in Zagreb

The cycle time on tram line T is theoretically defined as a sum of the total operating (travel) time on line To and the total time at terminals tt. In order to ensure the increasing of the operating and cycle speeds of trams in Zagreb, as well as increasing the gross transport work of a single line with the same number of trams and drivers in one shift, this paper has explored a scenario for simulating cycle time savings by reducing the total operating time, both achieved by the possible implementation of tram priority via traffic lights based on the local automation. Possible realistic saving of the total operating time ΔTo on line No. 17 in Zagreb is based on the assumption that all signals at the traffic lights for trams should be green due to tram priority via traffic lights. Real operating time savings ΔTo was measured by using the stopwatch - pencil - record list method. The measurements were conducted in the middle shift during the afternoon peak load, as well as in the early shift during the morning peak load, for all of the seven days in one week, and for the new tram NT 2200 which accounts for 51% of the ZET tram fleet, on line No. 17. This paper has explored the ideal and maximum positive cycle time scenario, based on the measurement of possible maximum operating time savings ΔTo as the sum of the duration of all red signals at traffic lights for trams in one cycle in real traffic situations in Zagreb.

Anthropometric Measures Important for Control Panel Design in Locomotive or Railcar

Frequently used commands on the locomotive or railcar control panel need to be arranged mainly within the normal reach of the arm, using multi-purpose controllers for serving several important and frequently used functions by one hand, whenever possible. From the measured anthropometric measures in the central 90% from the sufficient and random sample of 50 engine drivers the range of normal and maximal reach of arm has been defined using statistical methods for the entire population in Croatia. The ranges of statistical anthrompometric measures of the engine drivers are the constitutional factors from the group “human factor”, and according to Fuller TCI model “task requirement – driver’s capability” affect the difficulty of the task during driving. The correlation dependence of lumbar moment Ml on the index of mass BMI has been proven in the hypothetically most unfavourable statistical seating working position, and based on the really measured statistical anthropometric measures.