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The proof of the pudding is in the eating' Implies that truth and knowledge can be evaluated by the objective results of their application.

• Client: Municipality of Miskolc
• Location: Miskolc
• Year of design: 2010.
• Year of execution: 2012
• Designers: Schvanner Norbert, Dohány Máté

One of the major cities of Hungary, Miskolc has embarked in the reconstruction of its tram – inner city - transportation system which was financially fully supported the European Union. The owner/operator of the existing transportation of the city issued a tender call for a transportation study which can provide a specific testing / evaluation model. The model had to deal with the real time testing and evaluation of the functional electrical supply system of the rolling stocks under operational conditions and the model has to provide opportunity for correction of the systemic short falls and measurable real-time information for efficiency changes.
Our firm was awarded to prepare the study and we provided a model by using the State of the Arts of traffic simulation software called VISSIM which is extensively employed within the European Community for solving the traffic related engineering issues. One of the sub- modules of VISSIM can provide real time parameters - like velocity, acceleration, location - of each vehicle moving the simulated traffic network of any given city. In the study we mathematically connected the actual power demand and feed back to the supply grid system of each operation tram to the above noted parameter. With this connection we managed to obtain the real time electricity consumption of each or all vehicles moving within the simulated system and it became possible to provide real-time energy demand information to the operator. This crucial information can enable the operational personals to correctly judge the system efficiency and correct the system deficiencies.
The study provided crucial information to the system design way before the actual system design by simulating the actual traffic parameters of the trams; therefore, the design and even operational mistakes/ over sights can be filtered out and instantly corrected.
The opening sentence - The proof of the pudding is in the eating - implies that our consulting work and engineering knowledge can clearly be evaluated by the objective results of their application.
The following paragraph briefly provides basic information about the technical background of the major aspects of the study.

Our firm utilized a sophisticated German origin “ Transportation Design “ Software - VISSIM - called Planung Transport Verkehr [ PTV ] - meaning - Transportation System Design – . This software is working on the probabilistic /stochastic mathematical base considering the movement and dynamic properties like real time vehicular location, velocity, acceleration, deceleration of each tram moving on the rail network in time series [finite-time interval basis], the real time simultaneous electrical power demand and feed back of each moving vehicle on the network, the physical reaction time and physiological behavior patterns of each conductor of each tram.
PTV is technically highly sophisticated traffic simulation software employed for solving highly complex traffic related design issues with excellent results throughout the European Community [EU] countries.
PTV requires that the transportation system designer should input the below listed data in order to receive a successful simulation of the system operation:

1) The actual and designed numbers of tram stations in the tram lines with the corresponding number of platforms, platform lengths, the actual locations of platform on the designed lines.
2) Tables containing the actual and designed boundary data of each numerically designated tram line.
3) Tables containing the actual and designed data for the operating vehicles with relation to the launching time of the vehicles from the destination points
4) Tables containing data related to the electrical load demand - intake from and feed back to the grid – of each operating vehicles on the network.
5) The various requirements of the designed traffic network for the trams like the speed limitation, the allowable approaching distance between vehicles. etc.

When clicking on the picture above, you can watch a 3 minutes video

Conclusion:

We were able to test and carry out real time traffic simulation of the designed traffic network for the City of Miskolc. The professional engineers of our firm brilliantly utilized the VISSIM highly sophisticated traffic simulation features. We managed to simulate the traffic flow of the entire inner city rail network including all intricate indeterminate variables of the operational network. We made it possible to carry out comparative assessment for each moving tram and its impact on the operational efficiency of the entire network at any given second. This is like a microscopic assessment of the entire traffic network of the city. The result of this particular project enabled us to correctly assess the efficiency of the designed system prior to the actual construction and we managed to provide information to the design firm and to the client as to where the further efficiency measures could be implemented to reach a efficiently performing traffic system for the City.
Our engineering knowledge was successfully demonstrated by the objective results of our innovative effort bringing substantial saving in operational cost for our client.

Related links

• Further references in work type Traffic modeling
• Further references in work type Research
• Further references in work type Public transportation

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