Road guardrails of various types (made of reinforced concrete, cable and metal) are installed on the shoulders and traffic lanes of urban and suburban roads. Metal guardrails, consisting of Σ-shape and double T-shape metal posts and a protective W-shape horizontal beam, are the most popular. The deformation processes of the Σ-shape and double T-shape metal posts of the above-mentioned guardrails are examined. A mathematical model of Σ-shape (or double T-shape) metal post is developed. A metal post of Σ-shape (or double T-shape) is modeled, using one-dimensional firstorder finite elements, and taking into account elastic deformations, as well as the effect of soil on the buried post section of the guardrail. The deflections of Σ-shape and double T-shape metal posts caused by the impact of a motor vehicle moving at varying speed are determined.

Pedestrian in pedestrian crossing thinks that he is absolutely safe. But not all existing pedestrian crossings can ensure safe crossing of the street. Therefore, is mandatory to install pedestrian crossings, which will be friendlier for pedestrians and for other road users. Unfortunately, until now in Lithuania there were no detail installation standards adopted specially for pedestrian crossings. Also, there was no clear vision when and how to install pedestrian crossings as well as traffic calming measures close to them. This article presents analysis of "Pedestrian crossings installation rules" which were prepared and adopted in 2012 for the use in Lithuania.