Calculation of Critical Vehicle Speeds Negotiating Through Curve

A great number of very severe traffic accidents occurs as thedirect result of destabilisation of the vehicle negotiating a curve,most often caused by excessive speed of the vehicle for the givencurve configuration, and for the given surface condition. Therefore,the issue of determing the speed in negotiating curve is notjust a problem met by experts involved in the analysis of the actualtraffic accidents, but also a question without which the preventivesafety measures in road traffic cannot be thought of,both regarding the construction and design of the roads, and regardingspeed limitations at certain points. The aim of this papersis to define a exactly analyticall method for case of actualvehicle negotiating a curve situation

Optimisation of Gas Transport in Distributive Gas Networks

The article deals with the problem of network facilities locationin the low-pressure networks. It is a "general m-median"problem. The demand of gas is defined both in the nodes andalong the edge. The problem is solved by a heuristic algorithm.It searches for the optimal location of supply facilities in thenetwork using Mini-sum criterion. The continuous demand oneach link is replaced by a concentrated demand in the middlepoint of the link

Influence of Lateral Vehicle Acceleration on Distribution of Braking Forces as Causes of Traffic Accidents

Considering previous calculation of vehicle speeds negotiatingcwvcs, in this paper we are trying to define and detenninelateral accelerations which occur when a vehicle negotiates acun1e. We have also analysed how the speed of negotiating acwve influences the braking force, which is in many traffic accidentsthe cause of the accident, if the braking system is not adjustedto the speed (and vice versa)