Современные информационные технологии/1. Компьютерная инженерия

cand. tech. sci. Semakhin A.M.

student Shulgin М. A.

Kurgan State University, Russia

THE PROGRAM OF MODELING OF AN ADJUSTABLE CROSSROADS

Increase of a management efficiency by transport streams on an adjustable crossroads is an actual problem. Simulation modeling - a method of research and an estimation of efficiency of systems, which behaviour depends on influence of random factors [1].

Statement of a problem. To develop the simulation model, allowing to model transport and foot streams on an adjustable crossroads and to formalize it on the personal computer.

The given system should meet following requirements:

- To have an opportunity of modelling of transport and foot streams, on an adjustable crossroads;

- To have an opportunity of definition of the best operating mode of a traffic light;

- To have an opportunity of preservation of results of modelling in a database;

- To have an opportunity of a conclusion of results of statistical experiment realized on the personal computer;

- Processing results of statistical experiment.

The general description of model. The crossroads of roads (streets) with all in its geometrical parameters, transport and foot streams at their interaction makes complex mathematical model. We shall consider its basic characteristics:

- Passing a part of a direction has one or several k strips movements, k=1,2, …, k;

- One transport and foot streams of directions j=1,2,3,4 arrived to stop-line with intensity λ, form turns at forbidding movement of steps (signals) of a traffic light. Other vehicles which has arrived to stop-line at steps resolving movement of a traffic light, pass a crossroads without a stop before it;

- The vehicles and the pedestrians who are being turn, at inclusion of a resolving signal begin movement;

- At travel of a crossroads of the vehicles can change a direction of movement - directly, on the left, to the right. If from a current strip fulfilment of maneuver is impossible, there is an attempt of change of a lane;

- Vehicles and the pedestrians who are being during the moment of change of the resolving step in a zone of a crossroads or outside of it at stop-line, have time to cross a crossroads with performance of necessary maneuvers at an intermediate (yellow) step;

- It is supposed, that in each direction to border of a crossroads-stop-line there arrive transport streams. Thus the casual moments of time of occurrence are distributed on exponential to the law. Occurrence occurs on the certain distance from a crossroads. Movement of vehicles is carried out according to model of movement.

The choice of a direction of movement on a crossroads is carried out according to probabilities specified by the user.

Initial parameters:

- Geometrical parameters of a crossroads;

- Intensity of transport streams;

- An operating mode of a traffic light;

- Are as a result of natural supervision for each concrete crossroads separately, in view of local conditions.

Are generated by means of generators of random numbers:

- Overall dimensions of vehicles;

- Features of drivers of vehicles;

- A direction of movement on a crossroads.

In the program the microscopic model of movement of cars is used. For a basis the model of the Intelligent Driver Model taken. The model is checked up on quality.

For system engineering has been chosen Microsoft Visual C# and MySql.

The diagram of classes is resulted in figure 1.

Fig. 1 The diagram of classes

Results of the researches have allowed to draw conclusions.

1. The program formalizing work of an adjustable crossroads is developed.

2. The developed program allows to raise a management efficiency streams on an adjustable crossroads

References:

1. Gultyaev A. K. Simulation modeling in Windows environment. – SPt.: Crown, 2001. – 400 p.