• Glossary

Glossary

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A#

• application: An application is a computer program, herein, an "application" mostly means one of the main, compiled programs that are included in the SUMO package.

• additional-file: A file that can be included in a sumo configuration. This is needed to load pois, shapes, bus stops and variable speed signs. Refer to the format description for details.

C#

• connection(s)-file: An XML-file describing connections between edges or lanes, see connection descriptions for importing networks defined as XML

D#

• DELPHI: Deutschlandweite Echtzeit Verkehrs-Lage und Prognose im Ereignisfall

• destination: The position of the end of a vehicle journey. Mostly a TAZ processed by OD2TRIPs within which a "sink" edge lies

• detector: An artificial device for object (mainly vehicle) states recognition and/or logging

• DFD: Deutsches Fernerkundungsdatenzentrum des DLR

• district: see TAZ

• DLR: Deutsches Zentrum für Luft- und Raumfahrt

• DUA: Dynamic User Assignment

• DUE: Dynamic User Equilibrium

E#

• edge: A single-directed street connection between two points (junctions/nodes). An edge contains at least one lane

• edge(s)-file: A XML-file describing edges of a road network, see edge descriptions for importing networks defined as XML

F#

• FCD: Floating Car Data

I#

• induction loop: A detector placed on a certain position on a lane which recognizes vehicles passing it and logs their attributes (speed, size, etc.)

J#

• junction: The place an edge begins or ends at (same as node)

• junction logic: The part of a junction which determines the vehicle behavior at the according junction by using certain right-of-way - rules

L#

• link: A connection between two lanes within a junction. Within microsim, each lane has links (connections) to the following lanes. A link contains the information whether the vehicle has to decelerate in front of the junction.

M#

• macroscopic: In a macroscopic traffic (flow) simulation, the atomic instances are roads; the flow is simulated directly (see microscopic)

• mesoscopic: In a mesoscopic traffic (flow) simulation, the streets are partitioned into sections which multiple vehicles may enter and leave at each simulation step

• microscopic: In a microscopic traffic (flow) simulation, the atomic instances are vehicles; the flow is simulated by simulating the vehicles (see macroscopic)

• multimodal: A multimodal traffic simulation is capable of processing different types of traffic (busses, trains, vehicles etc.)

N#

• (street) network: In our terms, a network is the combination of junctions (nodes) and edges (streets)

• node: A node (junction) is a single point were at least one edge (road) starts or ends

• node(s)-file: A XML-file describing nodes of a road network, see node descriptions for importing networks defined as XML

O#

• O/D-matrix (od-matrix): Origin/Destination-matrix; describes how many vehicles are moving from each origin to each destination within a certain time period

• option: A parameter for the application which determines what or how an application shall do

• origin: The position of the begin of a vehicle journey. Mostly a TAZ processed by OD2TRIPs within which a "source" edge lies

P#

• poi: short for "point of interest"; A position of an object that may be interesting

R#

• route: A route is a complete description of a vehicle's path over the network; it contains the information when the vehicle departs (the route starts) and over which edges the vehicle shall drive

S#

• script: A small computer program which normally doees not have to be compiled. The SUMO package includes several scripts, most written in Python

• source: A source means a place at which vehicles are inserted into the street network

• source-tar-ball: A file containing the sources (program code) for a project. The source code must be compiled in order to get the runnable application. It is called "tar-ball" because of using the application "tar" to join all the source files into a single file.

• submicroscopic: In a submicroscopic traffic (flow) simulation, the atomic instances are parts of the vehicle or the driver (gearing or behavior is modelled)

T#

• TAZ: Traffic Assignment Zone, a collection of edges describing a part of a road network's area (also called 'district')

• TIME: Either a floating point value in seconds (42.3) or a human-readable-time in the format HOUR:MINUTE:SECOND (6:30:0.5) or DAY:HOUR:MINUTE:SECOND (35:12:0:0)

• TLS: traffic lights system

• trip: A reduced information about a vehicle's movement; contains only the departure time, the begin, and the end edge. Must be transformed into a route using a router for being used within the simulation

• trip-table (trip list): A file containing several trips

• TS: Institute of Transportation Systems at the German Aerospace Center (DLR)

• TS-BS: TS Standort Braunschweig

• TS-BA: TS Standort Berlin-Adlershof

• type(s)-file: A XML-file describing types of streets, see type descriptions for importing networks defined as XML

X#

• XML: "eXtensible Markup Language is a universal format for structured documents and data" as the w3c says. Further information may be found at http://www.w3c.org/XML/ or http://en.wikipedia.org/wiki/XML. Most of the data read and written by SUMO is stored as XML, see also the page on file types.

• XSD: XML Schema Definitions "... provide a means for defining the structure, content and semantics of XML documents" as the w3c says. Further information may be found at http://www.w3.org/XML/Schema or http://en.wikipedia.org/wiki/XML_Schema_%28W3C%29. A part of the XML data formats used by SUMO is covered by xsd, see the page on file types.