Z/Changes from Version 0.17.1 to Version 0.18.0

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Version 0.18.0 (28.08.2013)


  • Simulation
    • fixed crash/hangup if a step-length below the minimum of 0.001 is given
    • fixed bug that caused visual collisions (vehicles on different lanes occupying the same space while on a junction)
    • fixed bug where vehicles were inserted with unsafe speeds on minor roads causing collisions
    • removed arrival attribute from vehicle routes output for non arrived vehicles
    • now saving all routes if a vehicle is rerouted multiple times
    • fixed crash when using calibrators
  • TraCI
    • the return values for link direction and link state are now working for lane variable: link (0x33)
    • routes are now preloaded before the first simulation step such that getMinExpectedNumber gives good results from the very start
    • Fixed documentation bug that stated geodetic positions have the format LAT,LON whereas they actually use LON,LAT. TraCI behavior remains unchanged.
    • Fixed rerouting for not departed vehicles (change target, change route and change route id)
    • street-names will no longer be missing from the output when importing a net.xml or edg.xml file which has them
    • using option --ramps.no-split <BOOL> no longer creates networks with faulty connections.
    • fixed bug that caused invalid connections to be generated where roads split or merge
    • fixed invalid traffig light logics and occasional crashes when importing a .net.xml file along with split elements
    • when importing sumo networks, dangerous connections (multiple connections from the same edge to the same lane) are no longer silently discarded
    • fixed bug that caused invalid node geometries when using --junctions.join together with ramp building options --ramps.*.
    • option --ignore-errors <BOOL> now works correctly when a vehicle is not allowed to drive on its depart edge
    • vehicles with guiShape="pedestrian" now have the same size in all levels of detail
    • traffic lights and lane-to-lane connections are now drawn for railways


  • Simulation
    • improved simulation speed
    • added option --link-output <FILE> for recording the approach of vehicles at junctions. This option addresses the need of developers when investigating junction control.
    • added new abstract vehicle classes "custom1" and "custom2" for user defined purposes.
    • drivers on a minor road now grow impatient while waiting for a gap in the traffic. After a while they will drive even if it means that another car has to slow down to accommodate them (as before, they will only drive if it is safe to do so).
    • added vType attribute impatience which affects the willingness of drivers to cut into traffic even if it forces other drives to brake.
    • added support for stop-signs at minor roads
    • added support for the intersection type allway_stop. [This corresponds to an intersection type found in north america]
    • added option --fcd-output.signals <BOOL> for including a vehicles signal state in the output (brake lights etc.)
    • implemented "expected" attribute for stops, which expects IDs of people that have to enter the vehicle to allow the vehicle to leave the stop. Should be used with "triggered='true'" (would not work otherwise). Thanks to Shubham Jain for pointing out the wrong description of the possibilities in [1].
    • added options for saving and loading simulation states. Simulation states can

be saved at predetermined times and then loaded to initialize a new simulation (this also requires loading the network and routes of the original simulation). When the filename for saving ends with .sbx the file will be saved in a binary format instead of xml.

    • option --sloppy-insert <BOOL> is marked deprecated because the behavior is now the default, use --eager-insert <BOOL> to get the old behavior
    • vehicle route output for persons now includes complete plans
    • it is now possible to toggle the simulation time display between 'seconds' and 'hour-minute-seconds' by clicking on the 'Time'-button next to the time display. The state of this setting persists across GUI sessions.
    • it is now possible to toggle between alternate delay values by clicking on the 'Delay'-button next to the delay dial. Clicking causes the current delay value to be saved as the alternative value. The alternative delay value persists across GUI sessions.
    • parking vehicles are now being drawn (at the side of the road)
    • the vehicle parameter table now contains information about the status of stopped vehicles
    • vehicles can now be colored by their selection state
    • added option for selecting a vehicles foes at the next junction to the vehicle popup menu (useful when coloring by selecting)
    • brake lights will no longer be triggered when the route ends unless the vehicle actually has to slow down.
    • now providing separate options for customizing the visualization of persons
    • when using the option --no-internal-links the edge lengths are now increased to compensate for the missing internal links. Thus, route lengths will correspond better to physical distances and roundabouts are less prone to congestions.
    • added option --keep-edges.in-geo-boundary which works similar to option --keep-edges.in-boundary but uses geodetic coordinates instead of cartesian.
    • added new node type priority_stop. This works similar to type priority but minor links now require a stop
    • added new node type allway_stop. [This corresponds to an intersection type found in north America]
    • added option --ignore-errors.edge-type for ignoring unknown edge types during loading. This happens frequently when dealing with plain xml files based on OSM data.
    • now parsing the OSM-Attribute "tracks" to determine whether a railway element is unidirectional or bidirectional.
    • added option --osm.railway.oneway-default <BOOL> for setting the default behavior when importing railways without "tracks" attribute. The appropriate value depends on the mapping style of the regional OSM comunity.
    • added option --geometry.max-angle <FLOAT> which warns about sharp turns on an edge. This is enabled by default for turns above 99 Degrees.
    • added option --geometry.min-radius <FLOAT> which warns about sharp turns at the start and end of an edge. This is enabled by default for radii below 9 meters
    • added option --geometry.min-radius.fix <BOOL> which prunes geometry to avoid sharp turns at the start and end of an edge. This is disabled by default.
    • added option --check-lane-foes.all <BOOL> (default=false) for lifting junction restrictions for vehicles which exit on different lanes of the same edge without crossing paths. This improves junction throughput in many cases but is a more aggressive interpretation of german traffic laws.
    • added option --check-lane-foes.roundabout <BOOL> (default=true) for lifting some junction restrictions at roundabouts. This conforms to the typical layout of roundabouts where restrictions on lane-changing allow such movements.
  • TraCI
    • added optional flags for cmd stop (0x12) to set the parking and triggered status
    • added command stop state (id 0xb5) for retrieving the stopped,parking and triggered status
    • added command resume (0x19) for resuming from the current stop
    • reduced verbosity on connection close (no more good byes)


  • Simulation
    • The elements <vehicle>, <flow> and <vType> now support child elements of the form <param key="myKey" value="myValue/>. These can be used when implementing custom functionality (see Developer/How_To/Device).
    • code for messaging functionality removed (was disabled by default anyway)
  • Contributed/SmallMaps tools was removed because it was outdated
  • switched all references in code and documentation to sumo-sim.org
  • TraCI version is now 6