Objective: To determine the prevalence of obstructive sleep apnea syndrome (OSAS), as well as to identify factors associated with a greater risk of developing OSAS, among truck drivers. Methods: The study population comprised 209 truck drivers (mean age, 38.8 years; 98.5% males) at two branches of a transportation company. The mean body mass index was 26.5 ± 4.4 kg/m2. The participants complete...

A truck scheduling problem for container transportation in a local area with multiple depots and multiple terminals including containers as a resource for transportation is addressed. Four types of movements of containers as inbound full, outbound full, inbound empty and outbound empty movements as well as the time windows at both the origin and the destination are considered. The total operati...

In this paper we develop an iterative insertion heuristic for a site-dependent truck and trailer routing problem with soft and hard time windows and split deliveries. In the considered problem a truck can leave its trailer for unloading or parking, make a truck-subtour to serve truckcustomers, and return back to take the trailer. This can be done several times in one route. In our heuristic eve...

OBJECTIVE To determine the prevalence of obstructive sleep apnea syndrome (OSAS), as well as to identify factors associated with a greater risk of developing OSAS, among truck drivers. METHODS The study population comprised 209 truck drivers (mean age, 38.8 years; 98.5% males) at two branches of a transportation company. The mean body mass index was 26.5 +/- 4.4 kg/m(2). The participants comp...

In recent years, a growing concern related to large truck accidents has increased owing to the level of injury severity that can be sustained and to the related potential economic impact. Current studies related to large truck–involved crashes are scarce and do not address the human factors that can greatly influence accident outcomes. This study presents an analysis of data from the fusion of ...

We optimize ordering and inbound shipment decisions for a manufacturer that sources multiple items from a single supplier. The objective is to satisfy the requirements in the production plan with minimum transportation and inventory holding costs over a multi-period planning horizon. Transportation costs are charged to the manufacturer on a per truck shipment basis. We investigate the option of...

This study used the most current statewide crash data to perform an indepth analysis of heavy-truck crashes in Iowa. This study also attempted to assess crash experience with respect to commercial driver’s license (CDL) licensure. In addition, this study used citation data from the Iowa Department of Transportation (DOT) Motor Vehicle Division and Iowa State Patrol to investigate the possible r...

Object-oriented applications execute by performing operations on objects. In suites of inter-operating or integrated applications, such as are essential in an enterprise setting, the same objects must be manipulated by multiple applications. Each application generally requires its own particular operations to be supported. For example, a Shipping application might require Truck objects to suppo...

Intermodal transportation has experienced a phenomenal growth over the past two decades, and continues to be one of the rapidly growing segments of the transportation industry. This has been attributed to the competitive pressures on global supply chains, the increasing demand for new service patterns driven by ocean carriers as well as the globalization of industry (Szyliowicz, 2003; Stone, 19...

Transportation has an important role in the logistics of a company, both services and products. Increased orders 2020 for wooden speaker products at CV. XYZ (Wonoayu-Sidoarjo) makes this company try to minimize transportation costs their operational level. This study focuses on determining relationship between changes type fleet vehicle depot location product delivery time return terms adding t...