Sökning: "old roads"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden old roads.

  1. 1. Water in roads: Flow paths and pollutant spread

    Författare :Hedi Rasul; B. Olofsson; Helen Kristine French; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; De-icing salt; Road; Tracer test; ERT; Water content; Road pollutants; Flow pathways; Land and Water Resources Engineering; Mark- och vattenteknik;

    Sammanfattning : For better road construction and maintenance while minimising damage to the environment and groundwater, it is essential to monitor and model hydrological impacts on roads and consider pollution of groundwater. Water content in unbound material in road layers changes continuously and water flow usually occurs along pathways that are the main corridors for pollutant spread to groundwater. LÄS MER

  3. 2. Modelling of Traffic Performance for Swedish Roads and Motorways

    Författare :Per Strömgren; Harilaos Koutsopoulos; Nagui Rouphail; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rural highway; Intersection; Capacity; Critical gap; Flare; Micro simulation; Motorway; Ramp; Weaving; Merging; Queue; Delay; Over-saturated; Time-space; Roadwork zone; variable speed limit; harmonization; Transportvetenskap; Transport Science;

    Sammanfattning : This thesis consists of five scientific articles oriented towards capacity. Managing capacity constraints with associated delays is a big issue at new design as well as at trimming existing traffic facilities. LÄS MER

  4. 3. The promotion of safe behaviours at the community level : evaluation of a bicycle helmet-wearing campaign among 5- to 12-year-old children

    Författare :Céline Farley; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Safe behaviour; community-based program evaluation; bicycle helmet; voluntary behavioural change; socio-economic context. Säkert beteende; samhällsbaserad programutvärdering; cykelhjälm; frivillig beteendeändring; socioekonomiskt sammanhang.;

    Sammanfattning : Bicycle-related injuries are among the most important public health problems in childhood. In the Montérégie Region (Québec, Canada), at the beginning of the 1990s, a 4-year community-based program aimed at promoting voluntary bicycle helmet wearing among children aged 5-12 was implemented. LÄS MER

  5. 4. Indirect effects of predation in human-modified landscapes

    Författare :Ellinor Sahlén; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Large carnivores affect prey species, with cascading effects on entire ecosystems. In anthropogenic regions large carnivores come into conflicts with humans, especially in rural areas where farming and hunting traditions are widespread. As a result, large carnivores have been eradicated from many regions across their historical distribution. LÄS MER

  7. 5. Economic Project Risk Assessment for Sustainable Choice Of REmediation (SCORE) in Construction Projects

    Författare :Petra Brinkhoff; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; probabilistic risk analysis; sustainability assessment; construction companies; project risk assessment; cost-benefit analysis;

    Sammanfattning : Contamination of soil and/or groundwater is a problem all over the world. There is a desire from politicians and the supervisory authorities to tackle the contamination problem in order to protect future generations. LÄS MER