Vol 6 No 2 (2006)
2006-04-01
Vol 6 No 2 (2006)
2006-04-01
Articles
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Editorial Board EJTIR
Bert van Wee (Editor in Chief)
Delft University of Technology (NL)Eddy van de Voorde
University of Antwerp (B)Dominic Stead
Delft University of Technology (NL)Vincent Marchau
Delft University of Technology (NL)Serge Hoogendoorn
Delft University of Technology (NL)Rob van der Heijden
Radboud University Nijmegen (NL)Rommert Dekker
Erasmus University Rotterdam (NL)Caspar Chorus
Delft University of Technology (NL)Advisory Board EJTIR
Peter Nijkamp (Chairman)
The NetherlandsStef Weijers
The NetherlandsErik Verhoef
The NetherlandsDaniel Schefer
IsraelFrank Sanders
The NetherlandsPiet Rietveld
The NetherlandsAura Regiani
ItalyRobert Paaswell
United States of AmericaRicco Maggi
SwitzerlandMartin Lanzendorf
The NetherlandsVeli Himanen
FinlandIngo Hansen
The NetherlandsMarina van Geenhuizen
The NetherlandsPiet Bovy
The NetherlandsMichel Beuthe
BelgiumDavid Banister
United KingdomEditorial Board EJTIR
Bert van Wee (Editor in Chief)
Delft University of Technology (NL)Eddy van de Voorde
University of Antwerp (B)Dominic Stead
Delft University of Technology (NL)Vincent Marchau
Delft University of Technology (NL)Serge Hoogendoorn
Delft University of Technology (NL)Rob van der Heijden
Radboud University Nijmegen (NL)Rommert Dekker
Erasmus University Rotterdam (NL)Caspar Chorus
Delft University of Technology (NL)Advisory Board EJTIR
Peter Nijkamp (Chairman)
The NetherlandsStef Weijers
The NetherlandsErik Verhoef
The NetherlandsDaniel Schefer
IsraelFrank Sanders
The NetherlandsPiet Rietveld
The NetherlandsAura Regiani
ItalyRobert Paaswell
United States of AmericaRicco Maggi
SwitzerlandMartin Lanzendorf
The...Editorial Board EJTIR
Bert van Wee (Editor in Chief)
Delft University of Technology (NL)Eddy van de Voorde
University of Antwerp (B)Dominic Stead
Delft University of Technology (NL)Vincent Marchau
Delft University of Technology... -
Quality of service in urban transportation network is very important to the users of this network. Travel time in street networks is one, very important, aspect of this service, particularly for trips with purposes such as work or school. A conservative route choice concept based on a pessimistic view of travel time has been proposed to render a pessimistic equilibrium flow (PEF). This flow is different from a user equilibrium flow (UEF), particularly in congested networks, and has sometimes a lower total travel time than UEF. A street network design problem has been proposed to take into account the travel time fluctuations (or service quality) in the network. This design model is based on PEF and is called pessimistic network design (PND) model. It is shown by an example network that an implication of PEF consideration in a PND model is that projects with lower potential in getting congested are chosen as compared with the conventional network design problem.
Quality of service in urban transportation network is very important to the users of this network. Travel time in street networks is one, very important, aspect of this service, particularly for trips with purposes such as work or school. A conservative route choice concept based on a pessimistic view of travel time has been proposed to render a pessimistic equilibrium flow (PEF). This flow is different from a user equilibrium flow (UEF), particularly in congested networks, and has sometimes a lower total travel time than UEF. A street network design problem has been proposed to take into account the travel time fluctuations (or service quality) in the network. This design model is based on PEF and is called pessimistic network design (PND) model. It is shown by an example network that an implication of PEF consideration in a PND model is that projects with lower potential in getting congested are chosen as compared with the conventional network design problem.
Quality of service in urban transportation network is very important to the users of this network. Travel time in street networks is one, very important, aspect of this service, particularly for trips with purposes such as work or school. A conservative route choice concept based on a...
Hossain Poorzahedy, Sayed Nader Shetab Bushehri -
Urban freight transport has many sustainable aspects. It contributes to economic vitality and the competitiveness of a region. However, the less socially and environmentally friendly effects such as noise, pollutant emissions, and nuisance, are usually the central theme in designing urban freight transport policies. Restricting policies as time access restrictions and vehicle restrictions gain popularity among Dutch local authorities. More than half of the municipalities uses time access restrictions. In spite of the popularity of these policy measures, the effects on the distribution of retailers, the environment and the transport costs are not known yet. In this paper we present three case studies of food retailers, in order to examine the effects of time access restrictions and vehicle weight restrictions. We discuss the impacts on the transport costs and the distribution processes (on the retailer’s side) and the environmental impacts. To find these effects we design five scenarios, in which we vary the length of time access restrictions, the allowed weight of the weight restriction and the number of cities in which these regulations are used. In these scenarios we adapt, based on the likely reaction of the involved food retailers, the distribution activities to fit the regulations. The results show that the vehicle weight restriction as well as the time access restrictions have a negative impact on the retailers’ transport costs. In most cases we see that the policy measures also cause an increase in the pollutant CO2 emissions that are emitted during the distribution of the goods. The time access restrictions cause a cost-increase that develops more or less convexly, as more stores are affected by this policy measure. The turning point is around 45% of the stores affected. The weight restriction causes linear cost-increase as more stores are affected. Both policy measures affect especially the roundtrips that combine multiple less than truckload orders for different stores. The policy measures have a different effect on different retailers.
Urban freight transport has many sustainable aspects. It contributes to economic vitality and the competitiveness of a region. However, the less socially and environmentally friendly effects such as noise, pollutant emissions, and nuisance, are usually the central theme in designing urban freight transport policies. Restricting policies as time access restrictions and vehicle restrictions gain popularity among Dutch local authorities. More than half of the municipalities uses time access restrictions. In spite of the popularity of these policy measures, the effects on the distribution of retailers, the environment and the transport costs are not known yet. In this paper we present three case studies of food retailers, in order to examine the effects of time access restrictions and vehicle weight restrictions. We discuss the impacts on the transport costs and the distribution processes (on the retailer’s side) and the environmental impacts. To find these effects we design five...
Urban freight transport has many sustainable aspects. It contributes to economic vitality and the competitiveness of a region. However, the less socially and environmentally friendly effects such as noise, pollutant emissions, and nuisance, are usually the central theme in designing urban...
Hans Quak, René de Koster -
According to gerontological mobility research, appropriate settlement structures at the neighbourhood level and car availability are both playing a prominent role in the maintenance of mobility of elderly people. However, car availability is strongly connected to other individual attributes like age, health and gender. The paper presents empirical results from Germany, which support the thesis that car availability is not a cause for mobility, but rather a result of a specific life situation and way of life of elderly people, which is associated with a specific type of mobility. What is more, there is no evidence for a significant influence of settlement structures on mobility. The contribution is based on multiple regression analyses of leisure mobility of elderly people living in three different spatial contexts.
According to gerontological mobility research, appropriate settlement structures at the neighbourhood level and car availability are both playing a prominent role in the maintenance of mobility of elderly people. However, car availability is strongly connected to other individual attributes like age, health and gender. The paper presents empirical results from Germany, which support the thesis that car availability is not a cause for mobility, but rather a result of a specific life situation and way of life of elderly people, which is associated with a specific type of mobility. What is more, there is no evidence for a significant influence of settlement structures on mobility. The contribution is based on multiple regression analyses of leisure mobility of elderly people living in three different spatial contexts.
According to gerontological mobility research, appropriate settlement structures at the neighbourhood level and car availability are both playing a prominent role in the maintenance of mobility of elderly people. However, car availability is strongly connected to other individual attributes...
Joachim Scheiner -
This study concerns the deployment of large numbers of container transporting vehicles on a network consisting of (dedicated) roads and logistic sites such as container terminals. Each site is managed autonomously by a site manager. The fleet of vehicles is deployed by a fleet manager. On request of the site managers, the fleet manager allocates vehicles to be hired by the site managers. Next, within these allocations, each site manager issues transportation jobs and assigns these jobs to the allocated vehicles. The objective of the fleet manager is to avoid unpaid empty driving and to keep the size of its fleet just large enough the serve the demand for vehicles. The objective of the site managers is to minimize the operational costs. In this context a new coordination system is proposed to allocate vehicle capacity, operating on the basis of a win-win situation for all actors. The coordination takes place at two levels. One level concerns the drawing up of an adaptive fleet deployment plan. The other level resides under control of the individual site managers and concerns the assignment of transportation jobs to vehicles, given the allocations of the fleet deployment plan. Both use repetitive linear programming procedures. Small size simulation experiments show that the approach might be effective.
This study concerns the deployment of large numbers of container transporting vehicles on a network consisting of (dedicated) roads and logistic sites such as container terminals. Each site is managed autonomously by a site manager. The fleet of vehicles is deployed by a fleet manager. On request of the site managers, the fleet manager allocates vehicles to be hired by the site managers. Next, within these allocations, each site manager issues transportation jobs and assigns these jobs to the allocated vehicles. The objective of the fleet manager is to avoid unpaid empty driving and to keep the size of its fleet just large enough the serve the demand for vehicles. The objective of the site managers is to minimize the operational costs. In this context a new coordination system is proposed to allocate vehicle capacity, operating on the basis of a win-win situation for all actors. The coordination takes place at two levels. One level concerns the drawing up of an adaptive fleet...
This study concerns the deployment of large numbers of container transporting vehicles on a network consisting of (dedicated) roads and logistic sites such as container terminals. Each site is managed autonomously by a site manager. The fleet of vehicles is deployed by a fleet manager. On...
Joseph J.M. Evers -
Quite a number of international publishers are aware of the fact that international conferences can be linked to excellent books. So does Edward Elgar Publishing Limited. The publisher presented this book, the result of the international conference on applied infrastructure research held at the Berlin University of Technology in October 2002. It provides an overview of international trends in infrastructure regulation and financing. It also discusses the role of the state and the private sector in infrastructure provision. The editors state that infrastructure provision is increasingly considered to be a key to structural change and economic growth of both developed and emerging economies. At the same time, however, there is still a lot of discussion on the appropriate theoretical framework and policy recommendations to achieve objectives such as efficiency, fairness, and sustainable development.
Quite a number of international publishers are aware of the fact that international conferences can be linked to excellent books. So does Edward Elgar Publishing Limited. The publisher presented this book, the result of the international conference on applied infrastructure research held at the Berlin University of Technology in October 2002. It provides an overview of international trends in infrastructure regulation and financing. It also discusses the role of the state and the private sector in infrastructure provision. The editors state that infrastructure provision is increasingly considered to be a key to structural change and economic growth of both developed and emerging economies. At the same time, however, there is still a lot of discussion on the appropriate theoretical framework and policy recommendations to achieve objectives such as efficiency, fairness, and sustainable development.
Quite a number of international publishers are aware of the fact that international conferences can be linked to excellent books. So does Edward Elgar Publishing Limited. The publisher presented this book, the result of the international conference on applied infrastructure research held at...
Eddy van de Voorde -
The book is the selected proceedings of the second international conference of traffic and transport psychology (TTP) held in Bern, Switzerland, in 2000. The first conference took place 1996 in Valencia, Spain, the third 2004 in Nottingham, UK (Rothengatter & CarbobellVaja, 1997; Underwood, 2005). A casual look at the three volumes from the conferences indicates that their structure and contents are similar. In the volume under review, keynote lectures, selected papers and poster presentations are included. A first part contains an introduction by the editors and three chapters addressing the general issue of theory in a field of applied research such as TTP. The remaining parts are dominated by reported empirical studies with some interspersed overview, conceptual, or discussion chapters. Truthfully representing current TTP research, these include road user characteristics (cognition and performance, social and differential psychology, and impairment), road safety (driver information and support systems, enforcement and training, and selection and rehabilitation), and mobility and the environment
The book is the selected proceedings of the second international conference of traffic and transport psychology (TTP) held in Bern, Switzerland, in 2000. The first conference took place 1996 in Valencia, Spain, the third 2004 in Nottingham, UK (Rothengatter & CarbobellVaja, 1997; Underwood, 2005). A casual look at the three volumes from the conferences indicates that their structure and contents are similar. In the volume under review, keynote lectures, selected papers and poster presentations are included. A first part contains an introduction by the editors and three chapters addressing the general issue of theory in a field of applied research such as TTP. The remaining parts are dominated by reported empirical studies with some interspersed overview, conceptual, or discussion chapters. Truthfully representing current TTP research, these include road user characteristics (cognition and performance, social and differential psychology, and impairment), road safety (driver...
The book is the selected proceedings of the second international conference of traffic and transport psychology (TTP) held in Bern, Switzerland, in 2000. The first conference took place 1996 in Valencia, Spain, the third 2004 in Nottingham, UK (Rothengatter & CarbobellVaja, 1997;...
Tommy Gärling