نتایج جستجو برای: trucks
تعداد نتایج: 2929 فیلتر نتایج به سال:
The effect of trucks on the level of service is determined by considering passenger car equivalents (PCE) of trucks. The current version of Highway Capacity Manual (HCM) uses a single PCE value for all tucks combined. However, the composition of truck traffic varies from location to location; therefore, a single PCE value for all trucks may not correctly represent the impact of truck traffic at...
In this project we investigate the effect of heavy-duty trucks, equipped with different Adaptive Cruise Control (ACC) systems, operating in mixed traffic with manually driven passenger vehicles, on the environment and traffic flow characteristics. The sluggish dynamics of trucks whether manual or ACC that is due to their limited acceleration capabilities filters speed disturbances caused by lea...
Heavy-duty trucks make up only 3% of the on-road vehicle fleet, yet they account for > 7% of vehicle miles traveled in the United States. They also contribute a significant proportion of regulated ambient emissions. Heavy vehicles emit emissions at different rates than passenger vehicles. They may also behave differently on-road, yet may be treated similarly to passenger vehicles in emissions m...
Aim of this study was investigating a truck scheduling problem with uncertainty in both inbound and outbound problems. Scheduling authorities at cross-dock should consider these uncertainties and propose a scheduling & sequencing plan which is robust against these uncertainties. As we know, trucks don’t necessarily assign to receiving or shipping doors and should wait a while till a proper dock...
Each distribution center has a different solution to prepare itself for incoming trucks. Due to different circumstances trucks can arrive earlier or later than anticipated. It is very hard, or maybe even impossible, for distribution centers to predict the actual truck arrival times, when they don’t know anything about the schedules from incoming trucks. A solution for these distribution centers...
Truck-Shovel fleet, as the most common transportation system in open-pit mines, has a significant part of mining costs, for which optimal management can lead to substantial cost reductions. Among the available dispatch mathematical models, the multi-stage approach is well suited for allocating trucks to respected shovels in a dynamic dispatching program. However, with this kind of modeling sequ...
The problem of how to coordinate a large fleet of trucks with given itinerary to enable fuel-efficient platooning is considered. Platooning is a promising technology that enables trucks to save significant amounts of fuel by driving close together and thus reducing air drag. A setting is considered in which a fleet of trucks is provided with transport assignments consisting of a start location,...
This paper develops a model for automated matching of vehicles between aerial photos. We exploit the overlap from frame-to-frame in a sequence of aerial photos. The problem, in essence, is to determine if vehicles A, B, C, . . . in one photo, match vehicles X, Y, and Z in a temporally lagged second photo. The method is specifically applied to large trucks (tractor–trailer combinations). If a ma...
Most container terminals are still using a bar code system for gate passage of trucks and containers, and also using paper documents (slip) for the delivery of the information on storage location of container in a yard. For this reason, most trucks have to stop at the gate of the container terminals in order to perform several basic jobs. To enhance the productivity of gate management, this stu...
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