277 research outputs found

    Improving Ridership Projections of Proposed Bus and Rail Transit Projects to Evaluate Congestion Reduction Effects

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    119790Transit ridership data comprise one of the performance metrics examined when allocating funding to transportation projects, especially for those designed to reduce traffic congestion. The better the quality of the data, the more efficient the project prioritization process. The purpose of this study was to obtain better ridership data by answering three questions using Virginia-based data: How is transit ridership affected by changes to infrastructure and transit service such as the addition of real-time information systems, shelters, and lighting or increases in service frequency? What percentage of transit ridership occurs during peak hours of congestion? How does crowdsourced transit activity data compare to ridership data from Virginia transit agencies? Study methods included conducting extensive literature reviews to determine previous findings related to ridership effects of stop improvements and then conducting a before-after study in Virginia using ridership data from one Virginia transit agency

    Large reorganizations in butterfly communities during an extreme weather event

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    Drought events are projected to increase in frequency and magnitude, which may alter the composition of ecological communities. Using a functional community metric that describes abundance, life history traits and conservation status, based upon Grime’s CSR (Competitive-Stress tolerant-Ruderal)¬ scheme, we investigated how British butterfly communities changed during an extreme drought in 1995. Throughout Britain, the total abundance of these insects had a significant tendency to increase, accompanied by substantial changes in community composition, particularly in more northerly, wetter sites. Communities tended to shift away from specialist, vulnerable species, and towards generalist, widespread species and, in the year following, communities had yet to return to equilibrium. Importantly, heterogeneity in surrounding landscapes mediated community responses to the drought event. Contrary to expectation, however, community shifts were more extreme in areas of greater topographic diversity, whilst land-cover diversity buffered community changes and limited declines in vulnerable specialist butterflies

    Review of risk from potential emerging contaminants in UK groundwater

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    Environment Protection Agency.

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    Made available by the Northern Territory Library via the Publications (Legal Deposit) Act 2004 (NT).Executive summary -- Introduction -- 1. Background -- 1.1 Terms of reference -- 1.2 Scope and structure of the review -- 1.3 Ecologically sustainable development and governance -- 1.4 Ecologically sustainable development, principles and criteria -- 1.5 The Darwin Harbour Region -- 2. Ecologically sustainable development in legislation, policies and plans -- 2.1 Strategic development and management -- 2.2 Land use -- 2.3 Minerals, extractive materials and petroleum -- 2.4 Ports -- 2.5 Pollution, waste and public health -- 2.6 Water -- 2.7 Fisheries and marine areas -- 2.8 Biodiversity, heritage and natural resource management -- 2.9 Environmental assessment -- 3. Discussion and findings -- 4. Advice.Date:2010-0

    by the Environment Protection Agency program.

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    Made available by the Northern Territory Library via the Publications (Legal Deposit) Act 2004 (NT).Executive Summary -- 1. Introduction and Background -- 2. The Proposal -- 3. Regional Setting -- 4. Environmental Impact Assessment.Date:2007-03Cover title

    5 doors) - looking for mammals looking at cycads

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    Made available by the Northern Territory Library via the Publications (Legal Deposit) Act 2004 (NT).Date:2008-0
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