• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 25
  • 9
  • 2
  • 2
  • 2
  • 1
  • Tagged with
  • 47
  • 19
  • 14
  • 8
  • 7
  • 7
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 5
  • 5
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Analýza počtu vyprošťovacích zásahů na úseku -0,4 až 60,5 km dálnice D2 v závislosti na intenzitě provozu / Analaysis of the Number of Vehicle Extrications at the -0.4 - 60.5 Section of the D2 Motorway Depending on the Traffic Rate

Hrdličková, Petra Unknown Date (has links)
Diplomová práce se zabývá zpracováním základních technických dat pro určený úsek dálnice za účelem zpracování technologie odstraňování překážek na dálnici. A to v závislosti na předpokládané intenzitě dopravy predikovat na daných úsecích výkony pro vyprošťovací a odtahové služby. Práce se zabývá technologickým postupem prací. Jelikož špatná technologie vyproštění a neznalost konstrukce vozidel má za následek následné škody po nehodě. Profesionální přístup firmy vede k minimalizaci těchto škod. Vyprošťovací a odtahová firma musí mít náležitě vyškolené pracovníky a správně zvolenou technologii vyprošťování. To vede ke zkrácení doby omezení provozu a tím lze řešit i dobu pro zkrácení kolon. Dalším řešeným tématem bude intenzita provozu, která je důležitá při hodnocení v závislosti na počtu nehod i počtu zásahů a to v místech s nejvyšší intenzitou dopravy.
12

Analýza počtu vyprošťovacích zásahů na úseku -0,4 až 60,5 km dálnice D2 v závislosti na intenzitě provozu / Analaysis of the Number of Vehicle Extrications at the -0.4 - 60.5 Section of the D2 Motorway Depending on the Traffic Rate

Hrdličková, Petra January 2018 (has links)
This diploma thesis deals with the processing of basic technical data for a designated motorway section in order to develop a technology for removing obstacles on the motorway. Depending on the predicted traffic intensity, they can predict the recovery and recovery services in the sections. The thesis deals with technological process work. Because poor recovery technology and ignorance of the vehicle construction result in consequential damage after an accident. The professional approach of the company leads to the minimization of these damages. Recovery and removal companies must have properly trained personnel and well-chosen rescue technology. This leads to a shortening of the time limit of the operation and thus also to the shortening of the columns. Another topic addressed will be the traffic intensity, which is important in the evaluation depending on the number of accidents and the number of interventions, in the places with the highest traffic intensity.
13

Návrh řešení MÚK dálnice D1 se silnicí I/23 a II/602 u Kývalky / The proposed solution MÚK D1 motorway with road I/23 and II/602 u Kývalka

Březina, Michal January 2015 (has links)
The master´s thesis focuses on modification of existing interchange Kývalka on D1 motorway. The purpose of this thesis is to design optimal solution of junction of roads I/23 and II/602 with D1 motorway connecting all directions, considering transport capacity a safety. The another part of the thesis is widening motorway D1 to six lane arrangement with one lane for slow vehicles. At first, several possible designs were suggested of which two were chosen for further elaboration as a search study. In the end, thesis contains the comparison of two chosen designs.
14

Posouzení nákladů na vyproštění nákladního vozidla nad 18t hmotnosti po nehodě na dálnici speciálním vyprošťovacím vozidlem / Cost assessment for the disengage of truck over 18 tons of weight on the highway with the help of special vehicle

Šafránek, Štěpán January 2016 (has links)
The diploma thesis deals with the cost assessment of the rescue of vehicles over 18 tonnes of weight after a traffic accident on a motorway. It analyzes the factors which influence the cost of vehicle rescue and on their basis it sets out the methodology for calculating the unit price for one hour of work of emergency rescue vehicles.
15

ANALÝZA SVAHOVÉ DEFORMACE ZÁŘEZU DÁLNICE D11 / ANALYSIS OF A SLOPE DEFORMATION OF THE D11 MOTORWAY CUT

Rotová, Petra January 2014 (has links)
This diploma thesis consists of a research and a practical part. The research part summarises the problem of slopes movements. The practical part deals with the determination of the slope deformation causes, at the 76th km of the D11 motorway. Causes determination was based on laboratory tests of soil samples taken from the disrupted motorway cut, made at PřF UK soil mechanics lab. Tests of grain size composition were done, plasticity of the L 26 sample was determined and critical strength of the reconstituted L26 and L27 samples was found out in the Translational apparatus box. Soils were categorized due to the according standards and the acquired data were evaluated. In the BricsCAD software, a well arranged locality situation and the slope deformation crosscut underlayed with the geophysical ERT cut were illustrated. In the GEO5 software, slope stability models were created using the Spencer Method of Slices. The slip surface and the groundwater level during the disruption were determined. The practical part also covers a proposal of a remediation appropriate for this deformation and it's modelling in GEO5. For the remediation, the slope stability level is determined. The work is based on the specialized literature, articles, research reports and standards. Powered by TCPDF (www.tcpdf.org)
16

Rutschsichere Böschungen: Ein Verbundprojekt am ZAFT entwickelt neue Lösungen für die Sanierung von rutschgefährdeten Oberflächen

Kammel, Enrico, Engel, Jens 25 July 2014 (has links)
Die Oberflächen von Erdbauwerken sind neben den von der Funktion abhängigen Beanspruchungen z. B. als Verkehrsdamm, Deponieböschung oder Deich, auch witterungsbedingten Einwirkungen ausgesetzt. Frost-Tau-Wechsel können zur Auflockerung der obersten Schichten führen und Tauperioden sowie starke Niederschläge zur Sättigung des Bodens. In letzter Zeit häufen sich Rutschungen der oberflächennahen Bereiche an Verkehrsdämmen, Lärmschutzwällen und teilweise auch an Deichen. Ursachen sind die unzureichende Festigkeit des Bodens, die fehlende Stabilisierung durch Bewuchs und Beanspruchungen durch abströmendes Wasser. Das Forschungsprojekt am ZAFT hat zum Ziel, die oberste Schicht von Böschungen zu verbessern. Es sollen wirtschaftliche Alternativen zu den klassischen Verfahren des Erd- und Grundbaus entwickelt werden, mit denen die flächendeckende Sicherung von Erdbauwerken möglich wird.
17

Recharge / Recharge

Karlsson, Fredrik January 2021 (has links)
Recharge är en laddstation för elbilar med lokalproducerad el och en mötesplats för lokala och regionala aktörer att samlas, nätverka och utöva sina småskaliga verksamheter på. Projektet grundar sig i en undersökning av motorvägens roll på landsbygden. I undersökningen kartlades även småskaliga verksamheter inom matproduktion i området. Vidare diskuterar projektet tre huvudsakliga frågeställningar. Vilken är bilens roll i framtiden och hur en kan arkitektur som tar bilen i fokus ihop med ett hållbarhetsperspektiv se ut. Landsbygden har inte samma förutsättningar som staden för att bli fossilfria, därför utgår projektet från tesen att den rurala framtiden kommer bygga med bilen i fokus. De ytterligare frågeställningarna undersöker om det går att skapa en plats som integrerar motorvägen med landsbygden samt vilket resultat det blir om man kontrasterar de stora aktörerna Burger King och Cirkle K som ligger på platsen och byter ut deras globala näringskedja mot en småskalig, lokal och hållbar istället. / Recharge is a car charging station powered by locally produced electricity and a meeting place for local and regional users to gather, network and carry out their small-scale activities. The project is based in a survey of the motorway and its role in the countryside. The survey also mapped small businesses of food production in the area. The project discusses three main issues. What role does the car have in the future and what will a car and sustainability centred architecture look like. The countryside does not have the same opportunities for a car free future as the city does, therefore the project assumes that the future of the rural is going to be built with the car in focus. The other issues examines whether it is possible to create a place that integrates the motorway with the countryside and what result do you get if you contrast the large businesses Burger King and Cirkle K and swap their global chain of production with a small scale, local and sustainable one.
18

Multicriteria analysis and GIS application in the selection of sustainable motorway corridor

Belka, Kamila January 2005 (has links)
<p>Effects of functioning transportation infrastructure are receiving more and more environmental and social concern nowadays. Nevertheless, preliminary corridor plans are usually developed on the basis of technical and economic criteria exclusively. By the time of environmental impact assessment (EIA), which succeeds, relocation is practically impossible and only preventative measures can be applied.</p><p>This paper proposes a GIS-based method of delimiting motorway corridor and integrating social, environmental and economic factors into the early stages of planning. Multiple criteria decision making (MCDM) techniques are used to assess all possible alternatives. GIS-held weighted shortest path algorithm enables to locate the corridor. The evaluation criteria are exemplary. They include nature conservation, buildings, forests and agricultural resources, and soils. Resulting evaluation surface is divided into a grid of cells, which are assigned suitability scores derived from all evaluation criteria. Subsequently, a set of adjacent cells connecting two pre-specified points is traced by the least-cost path algorithm. The best alternative has a lowest total value of suitability scores.</p><p>As a result, the proposed motorway corridor is routed from origin to destination. It is afterwards compared with an alternative derived by traditional planning procedures. Concluding remarks are that the location criteria need to be adjusted to meet construction</p><p>requirements as well as analysis process to be automated. Nevertheless, the geographic information system and the embedded shortest path algorithm proved to be well suited for preliminary corridor location analysis. Future research directions are sketched.</p>
19

Genetic fuzzy logic approach to local ramp metering control using microscopic traffic simulation : a thesis presented in partial fulfillment of the requirements for the degree of Master of Engineering in Mechatronics at Massey University, Auckland, New Zealand

Yu, Xue Feng January 2009 (has links)
Ramp metering, one of the most effective solutions for improving motorway traffic flows, is playing increasingly important role in traffic management systems. Because of its capability to handle nonlinear and non-stationary problems, fuzzy logic based ramp metering algorithms have been always considered as an extremely suitable control measures to handle a complex nonlinear traffic system. This thesis proposes a genetic fuzzy approach to design a traffic-responsive ramp control algorithm for an isolated onramp. For a local ramp meter algorithm, the problem could be described as the inflow optimization of on-ramp, based on the evaluation of motorway traffic condition. If the inflow of on-ramp is considered as the decision variable, the ramp control problem could be treated as a nonlinear optimization problem of maximizing the evaluation function. The adaptive genetic fuzzy approach is actually a control approach to maximize the inflow of on-ramp under the restriction of evaluation function. In this thesis, a well-known fuzzy logic based ramp metering algorithms developed by Bogenberger is introduced and implemented with an on-ramp congestion model of Constellation Drive Interchange in a stochastic microscopic traffic simulator, Aimsun. To improve the performance of fuzzy control system, genetic algorithm is applied to tune the parameterized membership function of each fuzzy input to maintain the flow density of motorway blow the estimated congestion density. The performances of the genetic fuzzy logic control ramp metering are compared with FLC (fuzzy logic control) ramp metering by means of the percentage change of TTT (Total Travel Time) based on no control condition in Aimsun. The simulation results show the genetic fuzzy ramp metering has a more significant improvement on TTT and more strong stability to maintain system flow density than FLC ramp metering.
20

Obce v okolí dálnice D11: detekce souvislostí mezi socioekonomickými změnami a otevřením nového dálničního úseku / Municipalities around D11 highway: detection of links between socioeconomic changes and new highway section opening

Petráš, Marek January 2017 (has links)
Research thesis presents an analysis of changes that occurred in municipalities around the motorway D11, after there was opened a new section of motorway at the end of the year 2006, which extended the motorway about 45 km and its total length doubled. New section took over the traffic load from the original main routes heading from eastern Bohemia to Prague and a number of municipalities, which originally lay on unimportant local routes, improve abruptly their traffic location and exposure to the main centres of development. The aim of the work is to determine the extent to which the detected changes in assessed region can be put in connection with the opening of the new motorway section. The changes in the births and deaths of the economic subjects, with a resolution by industry and size category, changes in population growth by migration and changes in the ride to the main centres are examined. The obtained data are transformed into assessed indicators in such a way to minimize the impact of external influences, which needs to be counted with within the research. The evaluation is carried out using descriptive analysis, Difference in differences method and other statistical analyses. The results of the research show that certain manifestations can be put in connection with the opening of the...

Page generated in 0.0453 seconds