Tom Cherrett

How are WEEE doing? A global review of the management of electrical and electronic wastes

This paper presents and critically analyses the current waste electrical and electronic equipment (WEEE) management practices in various countries and regions. Global trends in (i) the quantities and composition of WEEE; and (ii) the various strategies and practices adopted by selected countries to handle, regulate and prevent WEEE are comprehensively examined. The findings indicate that for (i), the quantities of WEEE generated are high and/or on the increase. IT and telecommunications equipment seem to be the dominant WEEE being generated, at least in terms of numbers, in Africa, in the poorer regions of Asia and in Latin/South America. However, the paper contends that the reported figures on quantities of WEEE generated may be grossly underestimated. For (ii), with the notable exception of Europe, many countries seem to be lacking or are slow in initiating, drafting and adopting WEEE regulations. Handling of WEEE in developing countries is typified by high rate of repair and reuse within a largely informal recycling sector. In both developed and developing nations, the landfilling of WEEE is still a concern. It has been established that stockpiling of unwanted electrical and electronic products is common in both the USA and less developed economies. The paper also identifies and discusses four common priority areas for WEEE across the globe, namely: (i) resource depletion; (ii) ethical concerns; (iii) health and environmental issues; and (iv) WEEE takeback strategies. Further, the paper discusses the future perspectives on WEEE generation, treatment, prevention and regulation. Four key conclusions are drawn from this review: global amounts of WEEE will continue unabated for some time due to emergence of new technologies and affordable electronics; informal recycling in developing nations has the potential of making a valuable contribution if their operations can be changed with strict safety standards as a priority; the pace of initiating and enacting WEEE specific legislation is very slow across the globe and in some cases non-existent; and globally, there is need for more accurate and current data on amounts and types of WEEE generated.

Tourism and the smartphone app: capabilities, emerging practice and scope in the travel domain

Based on its advanced computing capabilities and ubiquity, the smartphone has rapidly been adopted as a tourism travel tool. With a growing number of users and a wide variety of applications emerging, the smartphone is fundamentally altering our current use and understanding of the transport network and tourism travel. Based on a review of smartphone apps, this article evaluates the current functionalities used in the domestic tourism travel domain and highlights where the next major developments lie. Then, at a more conceptual level, the article analyses how the smartphone mediates tourism travel and the role it might play in more collaborative and dynamic travel decisions to facilitate sustainable travel. Some emerging research challenges are discussed.

Urban Freight Consolidation Centers: Case Study in the UK Retail Sector

In recent years, traditional urban distribution systems have undergone major structural changes as a result of the increasing power of customers demanding greater variety of quality products at low cost. These customer demands have increased the competition between businesses, and at the same time more complicated and longer supply chains have emerged as a result of the globalization of many businesses in their search for low-cost production locations and access to new skills. In response, hub-and-spoke systems are increasingly used to deal with product flows from many origins and to many destinations. As a result, a growing number of studies have examined the establishment of various forms of intermodal transshipment centers to minimize the use of roads in city centers and support the frequent and rapid replenishment of goods at retail and catering outlets. This study examined the establishment of a consolidation center servicing nearly 100 businesses that operated in an urban shopping mall in Southampton, United Kingdom. Through the review of numerous existing UK and international consolidation schemes and the examination of their operational characteristics, the study aimed to identify potential strengths, weaknesses, and risks that would impact the operation of the consolidation center. Various operational scenarios considering business take-up combinations, vehicle delivery mixes, fill rates, and back-load practices were examined to elucidate the potential transport and environmental effects of the consolidation scheme. To quantify and to verify these effects accurately, a multistage analysis framework, including data collection, map routing, emissions assessment, and scenario-building activities, was developed.

Making training more cognitively effective: making videos interactive

The cost of health and safety failures to UK industry is currently estimated at up to £6.5 billion per annum with the construction sector suffering unacceptably high levels of work related incidents. Better health and safety education across all skill levels in the industry is seen as an integral part of any solution. Traditional lecture-based courses often fail to re-create the dynamic realities of managing health and safety (H&S) on-site and therefore do not sufficiently create deeper cognitive learning (which results in remembering and using what was learned). The use of videos is a move forward, but passively observing a video is not cognitively engaging and challenging, and therefore learning is not as effective as it can be. This article describes the development of an interactive video in which learners take an active role. While observing the video, they are required to engage, participate, respond, and be actively involved. The potential for this approach to be used in conjunction with more traditional approaches to H&S were explored using a group of second year undergraduate civil engineering students. The formative results suggested that the learning experience could be enhanced using interactive videos. Nevertheless, most of the learners believed that a blended approach would be most effective.

The evolution of urban traffic control: changing policy and technology

Abstract The history of urban traffic control (UTC) throughout the past century has been a continued race to keep pace with ever more complex policy objectives and consistently increasing vehicle demand. Many benefits can be observed from an efficient UTC system, such as reduced congestion, increased economic efficiency and improved road safety and air quality. There have been significant advances in vehicle detection and communication technologies which have enabled a series of step changes in the capabilities of UTC systems, from early (fixed time) signal plans to modern integrated systems. A variety of UTC systems have been implemented throughout the world, each with individual strengths and weaknesses; this paper seeks to compare the leading commercial systems (and some less well known systems) to highlight the key characteristics and differences before assessing whether the current UTC systems are capable of meeting modern transport policy obligations and desires. This paper then moves on to consider current and future transport policy and the technological landscape in which UTC will need to operate over the coming decades, where technological advancements are expected to move UTC from an era of limited data availability to an era of data abundance.

Transport impacts of local collection/delivery points

This paper presents an analysis of the vehicle mileage incurred by carriers and customers using local collection/delivery points (CDPs) for failed first time home shopping deliveries compared with the traditional carrier redelivery method. A number of key factors were identified, including the delivery failure rate, the carrier depot distance from the delivery area, the number of available collection points, the preferred modes of transport used by householders and the extent to which trips were combined with each other. The results of a case study using CDPs in the city of Winchester, UK, indicated that customer mileage could be reduced by over 80%, while the estimated impact on carrier mileage was negligible. Worst-case and best-case scenarios for the collection point delivery method were also modelled, which demonstrated that overall mileage could be reduced by 80% or increased by 40% depending on the assumptions made about the key factors.

Survey Techniques in Urban Freight Transport Studies

This article reviews and assesses the various survey techniques that have been used in studies in which data have been collected to obtain an understanding of road-based urban freight transport activities. The review identified 162 such studies in 18 countries over the last 50 years, and 12 different types of urban survey technique. In the studies reviewed, establishment surveys have been the most commonly used technique, followed by freight operator surveys, vehicle observation surveys, driver surveys, roadside interview surveys, and vehicle trip diaries. Few examples of other survey techniques (commodity flow, parking, global positioning system, supplier and service provider surveys) were identified. Establishment and vehicle observation surveys have the potential to offer insight into a wider range of issues associated with urban freight deliveries and collections to and from establishments in a specific urban area than the other survey techniques reviewed. These two survey techniques can provide insight into the frequency of goods vehicles deliveries and collections by time of day and day of week, the activities involved in the loading/unloading process, and the freight requirements of individual establishments. However, all 12 survey techniques provide insight into varying aspects of urban freight operations and various combinations are therefore likely to be used in future studies.

Loading bay booking and control for urban freight

This paper investigates the concept of a loading bay advance booking and control system for delivery and service vehicle drivers. A case study of Winchester High Street is presented to illustrate the potential impact of such a system. A number of operating scenarios were considered based on the punctuality of deliveries and service visits, using a comprehensive database of vehicle arrival patterns. The main performance measures used were adherence to schedule, delivery time and the use of unloading points, with reference to their desirability, both from the freight vehicle drivers’ and other road users’ viewpoints. The research has highlighted the different factors that would need to be taken into account when evaluating a managed loading bay system, from the standpoints of the various actors involved, including the traffic authority, freight operator, driver, retailer and other road users.

Understanding temporal rhythms and travel behaviour at destinations: potential ways to achieve more sustainable travel

This paper analyses the roles played by time in destination-based travel behaviour. It contrasts clock times linear view of time with fragmented time, instantaneous time, fluid time and flow, time out and the multiple temporalities of tourism experiences. It explores temporal issues in a destination travel context, using qualitative techniques. Data were captured using diary photography, diary-interview method with tourists at a rural destination; their spatial and temporal patterns were captured using a purpose built smartphone app. The analysis revealed three temporal themes influencing travel behaviour: time fluidity; daily and place-related rhythms; and control of time. Three key messages emerge for future sustainable tourist destination-based travel systems. Given the strong desire for temporal fluidity, transport systems should evolve beyond clock-time regimes. Second, temporal forces favour personal modes of transport (car, walk, cycle), especially in rural areas where public transport cannot offer flexibility. Third, the car is personalised and perceived to optimise travel fluidity and speed, but is currently unsustainable. Imaginative initiatives, using new mobile media technology can offer new positive and proactive car travel, utilising spare public and private vehicle capacity. Research is needed to implement mechanisms for individualised space–time scheduling and collective vehicle use strategies.

Traffic Management Parameters from Single Inductive Loop Detectors

Investigated are potential new uses for the digital output produced by single inductive loop detectors (2 m x 1.5 m and 2 m x 6.5 m) used in most European urban traffic control systems. Over a fixed time period, the average loop-occupancy time per vehicle (ALOTPV) for a detector being sampled every 250 ms is determined by taking the number of 250-ms occupancies and dividing by the number of vehicles. In a similar way, the average headway time between vehicles (AHTBV) is determined by taking the number of 250-ms vacancies and dividing by the number of vehicles. Over a 30-s period, the minimum and maximum values of ALOTPV and AHTBV ranged from 1 to 120 (an ALOTPV of 1 and an AHTBV of 120 representing free-flow conditions, an ALOTPV of 120 and an AHTBV of 1 representing a stationary queue). Identifying periods when a link was operating under capacity and at capacity and when it had become saturated could be more clearly identified by using plots of ALOTPV and AHTBV data over time compared to the more traditional percentage occupancy output. ALOTPV also was used to successfully identify long vehicles from cars down to speeds of 15 km/h.