10,909 research outputs found

    The Role of Responsive Pricing in the Internet

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    The Internet continues to evolve as it reaches out to a wider user population. The recent introduction of user-friendly navigation and retrieval tools for the World Wide Web has triggered an unprecedented level of interest in the Internet among the media and the general public, as well as in the technical community. It seems inevitable that some changes or additions are needed in the control mechanisms used to allocate usage of Internet resources. In this paper, we argue that a feedback signal in the form of a variable price for network service is a workable tool to aid network operators in controlling Internet traffic. We suggest that these prices should vary dynamically based on the current utilization of network resources. We show how this responsive pricing puts control of network service back where it belongs: with the users.Internet, pricing, feedback, networks

    The Impact of Policy Drivers on the Logistics Supply Chain.

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    This report is designed to highlight the impact of policy drivers on the freight logistics supply chain. This section will define the term policy drivers and outline the different types of impacts the can have upon the logistics supply chain. In Section Two a list of policy drivers is presented, along with associated policy levers. An attempt to assess what impact each policy lever has on the logistics supply chain is made in Section Three and in Section Four a number of policies levers are selected to take forward as possible scenarios to be evaluated in the University of Leeds cost modelling work. Policy drivers are defined as broad aims, targets or statements that are considered to be desirable by the various bodies of government or non-government organisations in satisfying their overall goals such as “maximising social welfare”, “staying in power” etc... The types of policy drivers vary by organisation and may be complimentary or contradictory. They may also change over time as new doctrine is implemented or new research findings put into practise. In the Government’s, ‘Transport 2010 - The 10 Year Plan’ (DFT, 2000) the policy drivers are outlined under the heading ‘Vision’ and are presented below, · Fully integrated public transport information, booking and ticketing systems; · Safer and more secure transport accessible to all; and, · A transport system that makes less impact on the environment. Policy levers are the policy instruments used to attain policy drivers and can be used to achieve more than one Both policy drivers and policy levers can be categorised under two headings as outlined below, a) Fiscal Drivers; and, b) Physical & Regulatory Drivers The implementation of these policies leads to both direct and indirect outcomes that will make some contribution to achieving the policy drivers set out by the government. The policy levers will impact upon the freight industry in a positive, negative or neutral manner and for the purposes of the next section three definitions have been formulated which have been related to the impact of policy levers on costs and externalities. In Section Four a broader range of impacts are discussed for the policy levers that have been selected as possible scenarios. A Positive Impact - Any outcome that, 1) Lowers operating cost without increasing externalities, and/or; 2) Lowers externalities without increasing costs. A Neutral lmpact – Any outcome that, 1) Maintains defacto operating costs without changing externalities, and/or; 2) Maintains defacto externalities with out changing operating costs. A Negative Impact – Any outcome that, 5 1) Increases operating costs, and/or; 2) Increases externalities. Making a judgement as to whether any one policy is beneficial or not is difficult in the absence of any data and will differ depending upon who you are. The judgements that will be made in this paper will apply to the freight logistics industry only and the externalities they produce. It is stressed that they are not exact. The next section will outline in more detail some of the possible policy drivers that either currently apply to or could be applied to the freight logistics industry. The likely policy levers that could arise from the policy drivers are then discussed along with the possible transport outcomes and their impact

    Supporting policy packages: the future of road pricing in the UK

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    Transport is already a large component of our economy and society. Historically, transport programmes were substantially about developing basic infrastructure networks. Now the emphasis is on the active management of systems and operating them to maximum advantage in the face of growing travel demand and capacity limitations. Combined developments in technology and the world economy have accelerated change to almost unpredictable levels. The change affects many areas and transport is not an exception. With new vehicle technologies, radical policies and the persistent growth in private and commercial vehicles, a new changing transport landscape is emerging. One of these changes comes in the form of sustainable transport management - managing the demand of existing infrastructure networks. The role of demand management has been illustrated in many reports and papers and it seems that governments are becoming more aware of it. This paper focuses on one particular demand management policy that is often regarded as radical and generally unacceptable. Road pricing often gets delayed or abandoned due to controversy, disagreements, unanticipated problems and a whole host of other delaying factors. There are complex interactions in transport management - there is a need for cooperation between networks, stakeholders and different authorities. Single measures that focus on 'sustainable transport' usually address a limited set of objectives and are not usually combined with other policy measures. When combined, it is sometimes unclear whether the multiple interactions between policy tools and implementation networks have been considered. An emerging case of implementation of a policy package in the UK is the support of road pricing initiatives combined with public transport improvements by the Transport Innovation Fund. The paper will present a review of the UK road pricing situation along with key implementation factors that show firstly the importance of combining policy tools and secondly the necessity in creating and maintaining strong implementation networks

    Time-dependent area-based pricing for multimodal systems with heterogeneous users in an agent-based environment

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    In this paper, we investigate an area-based pricing scheme for congested multimodal urban networks with the consideration of user heterogeneity. We propose a time-dependent pricing scheme where the tolls are iteratively adjusted through a Proportional-Integral type feedback controller, based on the level of vehicular traffic congestion and traveler's behavioral adaptation to the cost of pricing. The level of congestion is described at the network level by a Macroscopic Fundamental Diagram, which has been recently applied to develop network-level traffic management strategies. Within this dynamic congestion pricing scheme, we differentiate two groups of users with respect to their value-of-time (which related to income levels). We then integrate incentives, such as improving public transport services or return part of the toll to some users, to motivate mode shift and increase the efficiency of pricing and to attain equitable savings for all users. A case study of a medium size network is carried out using an agent-based simulator. The developed pricing scheme demonstrates high efficiency in congestion reduction. Comparing to pricing schemes that utilize similar control mechanisms in literature which do not treat the adaptivity of users, the proposed pricing scheme shows higher flexibility in toll adjustment and a smooth behavioral stabilization in long-term operation. Significant differences in behavioral responses are found between the two user groups, highlighting the importance of equity treatment in the design of congestion pricing schemes. By integrating incentive programs for public transport using the collected toll revenue, more efficient pricing strategies can be developed where savings in travel time outweigh the cost of pricing, achieving substantial welfare gain. (C) 2015 Elsevier Ltd. All rights reserved
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