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Source: US Bureau of Labor Statistics. Employment in the transport sector tends to have a lower female representation than the average. This is particularly the case for trucking and rail employment, where females account for less than 15% of the workforce. The composition of gender share in employment indicates substantial

The standard p-median problem seeks to find an optimal location for a number of p facilities considering a distribution of demand points. On the above representation of an isometric landscape, the p-median problem can be considered by:

The map depicts the location and square footage of all the distribution facilities operated by the online retailer Amazon in the United States. From these locations, the weighted median location was determined by the type of facility, which corresponds approximately to the demographic center of the United States. This implies

Author: Dr. Jean-Paul Rodrigue Location-allocation models look at assigning optimal location choices for facilities considering the distribution of the demand. 1. Context Location-allocation models are designed to assess the most suitable location for a single or group of facilities to serve a defined demand. This demand is often expressed as

Bottlenecks are major impediments to the free flow of traffic and occur under specific circumstances, mostly when nearing capacity. Under such circumstances, a small bottleneck can have important consequences, leading to an accumulation of delays. Four major causes can be identified:

A category of traffic assignment problems seeks to find the lowest possible costs for a fixed amount of traffic. The above example illustrates the assignment of 35 units between locations A and F at a minimum cost.

Assigning the maximum possible amount of traffic between two locations (A and F) can be solved heuristically:

Traffic Maximization. The purpose is to assess the maximal demand that a network can support considering its transport supply. Traffic maximization estimates the operational capacity of networks, that is, what amount of traffic they can handle under ideal conditions. The above graph (1) is the estimated optimal demand a network

Traffic assignment problems usually consider two dimensions.