Logistics

The concept of logistics is mostly realized by containers and container stops.

# Container stops

Container stops can be used to simulate transhipment stations, harbours and other places for transhipping and storing containers/goods. Similarly to the concept of bus stops, container stops are stops at which containers can be loaded onto or unloaded from a vehicle. Vehicles use the same advanced approaching behavior at container stops as at bus stops. Definitions of container stop locations in SUMO have the following format:

    <additional>
        <containerStop id="<CONTAINER_STOP_ID>" lane="<LANE_ID>" startPos="<STARTING_POSITION>" endPos="<ENDING_POSITION>" [line="<LINE_ID>[ <LINE_ID>]*"]/>
        ...
    </additional>

That means that a container stop is an area on a lane. The parameters have the following meanings:

Attribute Name | Value Type | Value Range | Default | Description
--- | --- | --- | --- | ---
id | string | id |  | The name of the container stop; must be unique
lane | string | valid lane id |  | The name of the lane the container stop shall be located at
startPos | float | -lane.length < x < lane.length (negative values count backwards from the end of the lane) | 0 | The begin position on the lane (the lower position on the lane) in meters
endPos | float | -lane.length < x < lane.length (negative values count backwards from the end of the lane) | lane.length | The end position on the lane (the higher position on the lane) in meters, must be larger than startPos by more than 0.1m
friendlyPos | bool | true,false | false | whether invalid stop positions should be corrected automatically (default false)
name | string | simple String |  | Container stop name. This is only used for visualization purposes.
color | color | see color definition | "83,89,172" | Container stop color. This is only used for visualization purposes.
lines | string list | A list of names separated by spaces (' ') |  | meant to be the names of the logistic lines that stop at this container stop. This is only used for visualization purposes.

Caution

Please note that container stops must be added to a config via the --additional-files parameter

Vehicles must be informed that they must stop at a container stop. The following example shows how this should be done:

    <vtype id="truck" accel="2.6" decel="4.5" sigma="0.5" length="15" maxspeed="70" color="1,1,0"/>
    <vehicle id="0" type="truck" depart="0" color="1,1,0">
        <route edges="2/0to2/1 2/1to1/1 1/1to1/2 1/2to0/2 0/2to0/1 0/1to0/0 0/0to1/0 1/0to2/0 2/0to2/1"/>
        <stop containerStop="containerStop1" duration="20"/>
        <stop containerStop="containerStop2" duration="20"/>
        <stop containerStop="containerStop3" duration="20"/>
        <stop containerStop="containerStop4" duration="20"/>
    </vehicle>

What is defined here is a vehicle named "0" being a "truck". "truck" is a referenced type declared earlier. The vehicle has an embedded route (written by hand in this case) and a list of stop places. Each stop place is described by two attributes, "containerStop" and "duration" where "containerStop" is the name of the container stop the vehicle shall halt at and "duration" is the time the vehicle shall wait at the container stop in seconds. Please note that the order of container stops the vehicle shall halt at must be correct.

You may also let a vehicle stop at another position than a container stop. The short definition of a vehicle's stop is:

    <stop [containerStop="<CONTAINER_STOP_ID>" | ( lane="<LANE_ID>" endPos="<POSITION_AT_LANE>" )] duration="<HALTING_DURATION>"/>

This means you can either use a container stop or a lane position to define where a vehicle has to stop. For a complete list of attributes for the "stop"-element of a vehicle see Specification#Stops.

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