Analysis of Selected Solutions for Sustainable Urban Deliveries in the Construction Industry

Modern cities are places where the ever-increasing human needs are met. This is possible through the creation of friendly living conditions and enabling economic exchange, as a result of which enterprises provide their clients with goods and services. Urban freight transport is an element that supports these processes. However, in addition to the benefits it delivers, its organization and impacts pose challenges in environmental, economic, and social terms. Implementation of construction projects is a determinant of the development of modern cities. However, this entails transport for supply purposes, which significantly affects the volume of freight transport in cities. Such a large share translates into a growing interest in the topic of using more sustainable ways of organizing and providing construction-related transport. The paper presents the first stage of research aimed at building a model for the implementation of good practices in the field of construction supplies. The aim of the paper was to analyze the transport of construction supplies in terms of compliance with the principles of sustainable development on the example of construction projects currently implemented in Szczecin. Furthermore, this paper is centered around collecting good practices in the field of construction transport. The goal was achieved using the analysis of the statistical data, non-structured observation, and surveys regarding construction projects being carried out in Szczecin, and also paper-and-pencil interviews with experts. It was possible to identify irregularities and gaps in knowledge in the field of sustainable urban freight transport for the implementation of construction supplies. The diagnosed current condition may be a significant source of problems in the future and clearly indicates the need for further research and action by both city authorities and enterprises in the direction of implementing measures for sustainable urban freight transport. As part of the paper, the possibility of using Petri nets in decision-making processes on the implementation of selected organizational solutions contributing to a more sustainable organization of construction supplies was also examined. The developed decision models were simulated in the HPSim software. Models created by the authors using Petri nets can be an important tool that clearly and transparently shows enterprises their possibilities in the implementation of good practices

Impact of the Construction Supplies Implementation on Road Safety in the City Center: A Case Study of the City of Szczecin

The development of modern cities is impossible without an increase in the number of construction projects implemented. However, in the conditions of limited spaces, local and national legal regulations, and logistic difficulties, their implementation is becoming a growing challenge. Construction supplies can pose a particular problem. Its planning, organization, and implementation have an impact not only on construction and assembly works, but also on the external environment of the construction site, of which traffic is an important element. The aim of the study was to analyze and answer the question of whether there is a connection between the implementation of construction supplies and the occurrence of road traffic hazards in cities on the example of Szczecin. In addition, the article aims to find solutions to reduce the number of road accidents and increase road safety. The conducted research also revealed the weak points of the system of collecting and analyzing data on road accidents. The research covered selected areas in the center of Szczecin, where construction projects have been implemented since 2016 and road accidents have occurred. The reference year is the year preceding the start of construction. The research on selected construction projects meeting the criteria, carried out in the article has shown that their implementation may have an impact on the level of safety in the areas adjacent to the construction site. However, the unequivocal statement of such relationship must be supported by extended research, covering a greater number of projects, additional consideration of the number of deliveries for supply purposes, and the characteristics of vehicles involved in road incidents