نتایج جستجو برای: truck scheduling
تعداد نتایج: 73254 فیلتر نتایج به سال:
BACKGROUND Several studies indicate that truck drivers have an increased risk of lung cancer, but few studies have examined lung cancer risk in heavy equipment operators. Workers in both occupations are exposed to diesel exhaust. AIMS To examine the incidence and mortality from lung cancer among truck drivers and among drivers of heavy vehicles. METHODS A computerised register of Swedish co...
Technology has changed trucks significantly over the years. As a result, consumer expectations, in terms of performance, have risen. In Western society, the comfort of products has developed into an important issue. Truck manufacturers recognize comfort as one of the major selling point, as it is thought to play an important role for buyers as well. In addition, employers are getting interested...
OBJECTIVES The present study aimed to investigate the illicit drug use patterns of long-distance truck drivers. This population is considered to be a special interest group in terms of drug-driving research and policy due to high rates of use, involvement of drugs in truck accidents, and the link between drug use and work-related fatigue. METHODS Qualitative interview data were collected from...
This study evaluates different strategic courses of action concerning the secondary transportation sector in Hyrcanian forests of Iran. The decision support method Analytic Hierarchy Process (AHP) has been utilized in the assessment of different strategies in truck selection. The assessments are based on the opinions of a group of experts in Iranian forest industries. Results showed that the tr...
Container terminals are places where cargo is transported from point to point using special equipment. One of the most important issues in planning coastal operations at container terminals is the issue of the planning of the embankment or quay, which has a significant impact on crane, yard, warehouse and truck routing programs. This research involved a basin planning model with a multi-pier si...
Background and aims Driving is a dangerous and difficult job. In proportion to the other occupational groups, driving has a higher rate of mortality, morbidity and absent due to illness. Drivers are susceptible to depression. Depression alters the thought, attitude and operational skills and leads to higher rates of accident. The aim of this study was to determine the prevalence of depress...
In this study, we consider the application of a simulated annealing (SA) heuristic to the truck and trailer routing problem with time windows (TTRPTW), an extension of the truck and trailer routing problem (TTRP). TTRP is a variant of the well-known well-studied vehicle routing problem (VRP). In TTRP, some customers can be serviced by either a complete vehicle (that is, a truck pulling a traile...
An algorithm for real time estimation of truck traffic in multi-lane freeway is proposed. The algorithm uses data from single loop detectors—the most widely installed surveillance technology for urban freeways in the US. The algorithm works for those freeway locations that have a truck-free lane, and exhibit high lane-to-lane speed correlation. These conditions are met by most urban freeway loc...
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