Despite the rapid and continuous progress in the construction of vehicles and accompanying improving road infrastructure, the road safety issue remains very serious. Especially, it concerns intersections and road junctions where nearly 30% of road accidents take place. The paper is focused on a new intelligent path displaying support system to be installed on intersections of complex geometry combined with multiphase traffic lights. It consists of optical projection of two different horizontal signs, i.e. strips designating lanes for the green-light directions and perpendicular blocking lines for the red-light directions.

W artykule poddano ocenie efektywność przekazu informacji w ruchu drogowym przez znaki o zmiennej treści. Praca składa się z dwóch części. W części pierwszej omówiono przeznaczenie i rodzaje znaków, uwzględniając technologię ich wykonania. W artykule skupiono się przede wszystkim na znakach o rysunku nieciągłym. W części drugiej, na podstawie przeglądu literaturowego oraz autorskiej ankiety, scharakteryzowano wymagania oraz oczekiwania kierujących w zakresie formy oraz sposobu przekazywania informacji. Artykuł uzupełniono za- łącznikiem, w którym opisano zasady wprowadzenia na rynek znaków o zmiennej treści jako wyrobu budowlanego.

The article presents a general description of the state of road safety in Poland in the years 2010-2019, taking into account the safety of pedestrians, who belong to the most vulnerable road users. The analyses were based on data obtained from the Road Traffic Bureau of the General Police Headquarters and the National Road Safety Council. The second part describes a proposition of methodology for ex post evaluation of the impact of a new road projecton road safety, including the necessary research tools. Both the proposed methodology and the presented research tools were verified in practical application during the works on the report “Impact of projects implemented under the III and IV priority axes of the Operational Program Infrastructure and Environment 2014-2020 on improvement of road accessibility and traffic load in cities” commissioned by the Centre for European Union Transport Projects.

This article presents the principles of selection of colours and the thickness of lines during designing of traffic signs, the legal aspects traffic signs must correspond to, test methods used during assessment of both roadway markings and vertical experimental traffic signs, results of studies of those signs and their assessment in the case of possible changes in drivers behaviour.

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