In article traffic safety of vehicles at the movement on crossings is considered. Possibility of a road accident is estimated. In article the initial speed, size of a stopping way of the second vehicle, taking into account overall dimensions of vehicles are determined.

Keywords: street road network, crossing, road accident, traffic safety, initial speed, stopping way

In article traffic safety of vehicles at the movement at intersections is considered. Possibility of a road accident is estimated. In article the interval of time at which TC2 becomes an obstacle for TC1 is defined and there can be a collision of the vehicles moving at an obtuse angle. Parameters of the movement of vehicles necessary for development of mathematical model are also determined.

Keywords: street road network, intersection, road accident, traffic safety

In article traffic safety of vehicles on a straight section of the road is considered. Possibility of a road accident at sudden braking ahead of the going car for any reason is estimated. For safety of the movement and prevention of capacity reduction of the road because of emergence of a road accident the vehicles moving on a straight section of the road of big extent have to observe the distance determined by formulas.

Keywords: road capacity, road accident, traffic safety, minimum and safe distance