Changes in the Structure and Thermal Conductivity of Crushed Ice Frozen Backfills

Crushed ice backfills are widely used in the regions of the North. There, in natural conditions in winter, it can be easily prepared for the subsequent arrangement and repair of damaged temporary road surfaces, sealing cracks in the ice layer, backfilling with over-ice water and for the formation of ice refrigerant reserves in refrigerated food storage facilities.

Automatic Creation of Heuristic-Based Truck Movement Paths for Construction Equipment Control

The demand for technologies related to smart construction is rising as the need for increased productivity in the field of construction becomes ever more important. The fourth industrial revolution has accelerated the growth of advanced technologies, including artificial intelligence, 5G, the internet of things, and more, and these technologies are key in relation to smart construction. During the construction phase of our study, a truck travelled along a temporary road within a construction site. Thus, optimizing the location of the temporary road enhances the truck’s moving path, resulting in increased productivity in the road construction process. Thus, in this work, the concept of automating a path for construction equipment (a truck) is proposed. The construction site was divided into cells, where five factors were suggested to create a cost model that could automatically be used to create one of the most efficient paths for construction equipment. With the proposed concept, one can automatically create one of the most efficient paths when deciding the location for a temporary road during construction.

Review of the Remetinec roundabout reconstruction project in Zagreb

A very complex problem of the main roundabout projects development concerning the solutions given in the location permit and preliminary design, as well as new knowledge about communal infrastructure is given. Based on the new geodetic survey, subsequent requirements of the audit, investors, and obtained special conditions, it was necessary to adapt the technical solutions of the preliminary design. Particularly demanding work was defining the protection of the construction pit. The solution foreseen by the preliminary design and location permit for the works to be carried out under the traffic could not have survived, because of the technological reasons for the construction of the underpass and the very complex situation with the installations at that location. These facts required a complete suspension of traffic at the site and finding solutions to the temporary traffic regulation around the site. This was an unplanned and very demanding moment, given that the daily traffic at the intersection was around one hundred thousand vehicles a day. The solution to this problem was found in the construction of a temporary road, which conducts traffic through and around the construction site, thus enabling the smooth technological and technical organization of works while simultaneously conducting public and individual traffic to and from the city.

Technology of reusable assembly power pipe trench and temporary road system

Based on the current situation of the temporary pipelines with disorderly layout and low integration, the temporary roads with time consuming, material consuming and environmentally unfriendly in, construction site, a new type of reusable assembly power pipe trench and temporary road system technology is proposed in this paper. The research background and research ideas of the technology are described; the partition, structure and connection of the system are designed; the stress of the system is checked by finite element method, and the main stress structure is optimized. The system has the advantage of high degree of integration, convenient transportation and installation, and high reusability, and it is in line with the modern construction concept of carbon emission reduction, green construction and civilized construction.

Advanced Driver-Assistance System (ADAS) for Intelligent Transportation Based on the Recognition of Traffic Cones

Great changes have taken place in automation and machine vision technology in recent years. Meanwhile, the demands for driving safety, efficiency, and intelligence have also increased significantly. More and more attention has been paid to the research on advanced driver-assistance system (ADAS) as one of the most important functions in intelligent transportation. Compared with traditional transportation, ADAS is superior in ensuring passenger safety, optimizing path planning, and improving driving control, especially in an autopilot mode. However, level 3 and above of the autopilot are still unavailable due to the complexity of traffic situations, for example, detection of a temporary road created by traffic cones. In this paper, an analysis of traffic-cone detection is conducted to assist with path planning under special traffic conditions. A special machine vision system with two monochrome cameras and two color cameras was used to recognize the color and position of the traffic cones. The result indicates that this novel method could recognize the red, blue, and yellow traffic cones with 85%, 100%, and 100% success rate, respectively, while maintaining 90% accuracy in traffic-cone distance sensing. Additionally, a successful autopilot road experiment was conducted, proving that combining color and depth information for recognition of temporary road conditions is a promising development for intelligent transportation of the future.

A new real-time method for finding temporary and permanent road marking and its applications

In this paper, a new real-time method for finding temporary and permanent road marking is proposed. The method is based on the geometrized histograms method for segmenting and describing color images. This method is able to deal with both rectilinear and curvilinear marking, as well as with color temporary and permanent road marking. It also makes it possible to distinguish temporary road marking from white permanent road marking. The developed method is stable under illumination and is able to work even for partially disappearing road marking, typical for late winter and early spring. In contrast to many other methods, this method does not require any information about camera parameters and calibration and is able to find road marking in images taken under unknown conditions. The proposed method has been implemented by a program written in C++, operating under Windows and Linux. The program operation has been tested on video records shot on typical Russian roads during different seasons and under diverse whether and illumination conditions. The processing speed is about 20 fps for a standard modern computer. Using parallel computing, this speed is reduced considerably. The results of program operation are presented and discussed. The developed program is a part of the computer vision component of the control system of the AvtoNiva pilotless vehicle.