THE STUDY OF THE OVERTAKING PROCESS IN THE SITUATION WHERE FROM THE OPPOSITE DIRECTION ANOTHER VEHICLE IS APPROACHING

Abstract

Taking into account the kinematic measures of the process of vehicle overtaking, in different situations of driving and the area situated between the critical interruption position of the overtaking maneuver and that of its continuing, from the process of overtaking - the dilemma area - where neither the decision of aborting the overtaking maneuver nor that of continuing it is safe, the paper assesses the distances covered by the vehicle running from the opposite direction (vehicle 3), in the consecutive stages of the overtaking process between the vehicle doing the overtaking (vehicle 1) and the one being overtaken (vehicle 2). In this sense, for each of the variants of overtaking had in view and road conditions considered, taking into account the variation of the distance between vehicle 1 and vehicle 3 after the returning in line of vehicle 1, which depends on the speed of the vehicle which is overtaking, we are analysing: the variation of the distance covered by vehicle 3, for the entire duration of the overtaking process between vehicle 1 and vehicle 2, according to this duration and the nature and state of the road, and respectively according to the running speed of vehicle 3 and the nature and state of the road;the variation of the distance covered by vehicle 3 while vehicle 1 covers the separation distance from the line, according to this duration and the nature and state of the road, and respectively according to the running speed of vehicle 3 and the nature and state of the road; the variation of the distance covered by vehicle 3 while vehicle 1 is running in parallel with vehicle 2, according to the duration of their parallel running and the nature and state of the road, and respectively according to the running speed of vehicle 3 and the nature and state of the road; the variation of the distance covered by vehicle 3 while vehicle 1 covers the distance of returning to the initial lane, according to this duration and the nature and state of the road, and respectively according to the running speed of vehicle 3 and the nature and state of the road; the variation of the distance between vehicle 1 and vehicle 3, at the separation moment from the line of vehicle 1, according to the running speed of vehicle 3 and the nature and state of the road; the variation of the distance between vehicle 1 and vehicle 3, at the initiation moment of the return of vehicle 1 to the initial lane, according to the running speed of vehicle 1 and the nature and state of the road, and respectively according to the running speed of vehicle 3 and the nature and state of the road.
The model of calculation developed can be at the basis of the design of driving assistance systems with the purpose of providing support to the driver in the consecutive stages of the process of overtaking vehicles.
Key words: vehicle, overtaking, speed, duration, distance, safety