Sökning: "traffic efficiency"

Visar resultat 1 - 5 av 266 avhandlingar innehållade orden traffic efficiency.

  1. 1. Evaluation of Dust Suppressants for Gravel Roads : Methods Development and Efficiency Studies

    Författare :Karin Edvardsson; Björn Birgisson; Andrew Dawson; KTH; []
    Nyckelord :Gravel road; dust; particulate matter; PM10; horizontal dust diffusion; deteriorations; maintenance; dust control; dust suppressants; efficiency; application rate; leaching; residual concentration; seasonal variations; salt solution; solid salt; calcium chloride; magnesium chloride; lignosulphonate; polysaccharide sugar ; bitumen emulsion; rape oil; starch; surfactant; mesa; clay; fine material content;

    Sammanfattning : Approximately 75 percent (300 000 km) of the total Swedish road network and 20 percent(20 000 km) of the national road network consists of gravel roads. One of the most significantproblems associated with gravel roads is traffic-generated dust emission, which contributes tothe deterioration of the road surface and acts as a major source of particulate matter releasedinto the atmosphere, thereby involving public economics, road safety, human health, andenvironmental quality. LÄS MER

  3. 2. Vessel Traffic Service (VTS): a maritime information service or traffic control system?

    Författare :Gesa Praetorius; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Cognitive Systems Engineering; Performance Variability; Resilience Engineering; Traffic Management; Functional Resonance Analysis Method FRAM ; Vessel Traffic Service;

    Sammanfattning : Vessel Traffic Service (VTS) is a shore-side maritime assistance service that supports bridge teams in their safe navigation of port approaches and other areas that present navigational difficulties. The VTS is implemented in national waters and provides vessels with information through transmissions and broadcasts on Very High Frequency (VHF) radio. LÄS MER

  4. 3. Vessel Traffic Service (VTS) : a maritime information service or traffic control system? : understanding everyday performance and resilience in a socio-technical system under change

    Författare :Gesa Praetorius; Erik Hollnagel; Joakim Dahlman; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vessel Traffic Service; Traffic Management; Cognitive Systems Engineering; Resilience Engineering; Performance Variability; Functional Resonance Analysis Method FRAM ; Technology byts ev till Engineering ; Teknik;

    Sammanfattning : Vessel Traffic Service (VTS) is a shore-side maritime assistance service that supports bridge teams in their safe navigation of port approaches and other areas that present navigational difficulties. The VTS is implemented in national waters and provides vessels with information through transmissions and broadcasts on Very High Frequency (VHF) radio. LÄS MER

  5. 4. Efficiency of the trackwork scheduling process in Sweden

    Författare :Daria Ivina; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railways; Maintenance management; Trackwork scheduling; Project Uncertainties; Lean; Efficiency;

    Sammanfattning : Efficient scheduling is vital for railway maintenance, which is increasingly challenged by rising train traffic and infrastructure wear. Trackwork often necessitates the reduction of train speeds and the partial or complete closure of tracks. LÄS MER

  7. 5. On the impact of noise and energy demand from traffic : An assessment using microscopic modelling

    Författare :Johan Nygren; Susann Boij; Romain Rumpler; Ciarán J. O'Reilly; Arnaud Can; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Traffic simulation; sustainable transport; noise emissions; environmental impact; energy efficiency; Trafiksimulering; hållbar transport; buller; miljöpåverkan; energieffektivitet; Vehicle and Maritime Engineering; Farkostteknik;

    Sammanfattning : Noise emissions from transportation remain one of the greatest environmental issues of modern day. Inhabitants in urban environments are especially exposed, with almost 80 million people in the European Union exposed to noise levels exceeding the recommended limits set by the World Health Organization (WHO). LÄS MER