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This article raises the question of transport infrastructure as a principal component of the social and economic system in any region of the world. Development of transport infrastructure leads to the so-called accumulation of effects obtained through various channels, e.g. upgraded communication and transportation technologies, shorter transit time, lower transport costs, improved safety and better long-term economic output in a given community. This paper presents a model valuation of economic and social effects of an investment made into road transport infrastructure based on a case study of the ring road designed to be constructed around Olsztyn. Analysis of the effects was based on the CBA (cost and benefit analysis) methodology, which is for example employed to evaluate the EU co-financed projects. The method presented herein will ensure more precise valuation of effects generated by planned investment projects and will be a tool supporting the decision-making process.
The aim of this work was to establish a level of polycyclic aromatic hydrocarbons (PAHs, recognised by the World Health Organisation as mutagenic and carcinogenic compounds) in samples of soil collected along the ring road in city Siedlce, which is an element of the main route Berlin-Moscow. Our investigation was carried out in selected points of collecting the samples since April to October 2000, i.e. in a period of growth and final vegetation of plants. Analysis was carried out using Solid Phase Extraction (SPE) and reverse phase High Performance Liquid Chromatography (HPLC). Concentrations of individual compounds were between 10⁻⁷ and 10⁻⁹mg kg⁻¹.
In 2009 and 2010, floristic research was carried at two sites in Wrocław, Poland. The first site was along 3.5 km stretch of the newly built city ring road between Bielany and Oporów. The second site was along a newly built road near the post office in Oporów. The aim of the study was to determine whether spatial and technical urbanization in the area has favored the development of a variety of segetal and ruderal communities. The sites examined were divided into four parts. Part 1 comprised the 2 to 3 meter wide zone immediately adjacent to the road. Part 2 comprised the 10 to 15 meter wide zone which had been used to load soil when the road was being built. Part 3 comprised wastelands, and Part 4 comprised cultivated fields. 11 species were found in Part 1, 64 in Part 2, 42 in Part 3, and 17 in Part 4. The appearance of different species did not last long because during construction, the soil screes in Part 2 were eliminated and the plants growing there were damaged. For two or three years after road construction was finished, many species were found in Parts 1 and 3, which increased the richness of the flora along the the Wrocław ring road.
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