A user rate is a type of transportation rate that is based on the usage of a specific mode of transportation, such as a shipping lane, port, or rail line. This type of rate is typically established by a governing body, such as a port authority or a regulatory agency, and is meant to cover the costs of maintaining and operating the transportation infrastructure used by the shipper. These rates are typically assessed on a per-shipment or per-container basis, and are usually based on factors such as the size of the cargo, the distance it is being transported, and the type of cargo being shipped. User rates are typically used to fund infrastructure projects and to maintain and improve the transportation infrastructure used by shippers, they are usually mandatory and non-negotiable. These rates are usually applied to all users of the infrastructure, regardless of their specific carrier or logistics provider.