Dear friends and colleagues,
we are happy to announce the latest release of SUMO.
Below is a list of the major changes since the previous release. You can
find the full list at
http://www.sumo-sim.org/userdoc/ChangeLog.html
Bugfixes
- Simulation
- fixed bug which caused vehicles to brake without good reason
(see [ticket
1052 <http://sumo-sim.org/trac.wsgi/ticket/1052>])
- flow on a highway will no longer come to standstill just to let
vehicles from an on-ramp merge.
- vehicles now manage to change to the necessary lanes much more
often and thus avoid having to stop and block upstream traffic.
- vehicles now use all lanes of a multi-lane roundabout instead of
only the outer lane.
- fixed several bugs which caused instantInductionLoops to miscount
vehicles
- fixed error in a car-following related formula which was causing
collisions (see [ticket 1026<http://sumo-sim.org/trac.wsgi/ticket/1026>])
- SUMO-GUI
- Right-click now always resolves to the correct object again.
- TraCI
- TraCI now returns the "netto" occupancy (without minGap) as other
outputs do
- Traffic light program changes via TraCI now takes effect
immediately instead of one step later. (Thanks to Christoph Sommer for
reporting and fixing this problem)
- DUAROUTER
- fixed crash when repairing routes with intermediate dead-end edges
- NETCONVERT
- fixed bug where roundabouts sometimes had incorrect right-of-way
rules
Enhancements
- Simulation
- added vType-attribute laneChangeModel for customizing the lane
changing behavior. Allowed values are *DK2008* (the model used until
version 0.18.0), *JE2013* and *LC2013* (the new default model).
- Vehicles moving across junctions now consider the exact crossing
points at which their paths intersect with other vehicles when
deciding on
their speed. This leads to smoother traffic flow across junctions.
- Teleport warnings now always include a reason. For a vehicle that
is teleported because its waitingTime exceeds time-to-teleport the reason
can be:
- *wrong lane* when the vehicle was stuck on a lane which did not
allow it to continue its route,
- *yield* when the vehicle was stuck on an unprioritized road and
did not find a gap in traffic or
- *jam* when the vehicle could not continue because there was no
space on the next lane
- SUMO-GUI
- now drawing blinkers to visualize a vehicles desire to change lanes
(this is only noticable if a vehicle cannot change lanes immediately).
- when drawing a vehicles route, the lanes which the vehicle intends
to use are highlighted where this is known (previously the rightmost lane
was always used).
- Added hotkeys Ctrl-A, Ctrl-S, Ctrl-D for running, stopping and
stepping the simulation
- Added a menu for opening the object locator dialogs. Using the menu
hotkeys allows searching for simulation objects without using the mouse.
- The vehicle parameter dialog now also contains informations related
to the vehicle type.
- TraCI
- lane change requests now have a higher priority by default and will
thus succeed much more frequently.
- added new command *lane change mode
(0xb6)*<http://sumo-sim.org/wiki/TraCI/Change_Vehicle_State>to control
conflict resolution between TraCI-lane-changing request and
lane-changing decisions by the laneChangeModel. It also allows
to override
safety constrainst and to trigger cooperative speed adjustments to better
fulfill change requests.
- The python API throws now a TraCIException on recoverable errors
(such as an unknown vehicle id) and brings the system in a
consistent state
(ticket 1043 <http://sumo-sim.org/trac.wsgi/ticket/1043>)
- added possibility to remove waiting cars inspired by Bob
Holcomb (ticket
942 <http://sumo-sim.org/trac.wsgi/ticket/942>)
- DUAROUTER
- major refactoring of input parsing, it is now possible to mix
trips, flows and vehicles in one file
- stops are respected on routing (ticket
988<http://sumo-sim.org/trac.wsgi/ticket/988>)
Other
- NETCONVERT
- modified naming conventions for internal lanes (see complete change
log for details)
- TraCI
- The documentation for vehicle value
retrieval<http://sumo-sim.org/wiki/TraCI/Vehicle_Value_Retrieval>
/modification
<http://sumo-sim.org/wiki/TraCI/Change_Vehicle_State>now includes
information on setting/retrieving vehicle-type related values
for individual vehicles (i.e. length, maxSpeed).
- TraCI version is now 7
We thank all contributors and wish you all the best.
Marek, Laura, Melanie, Jakob, Michael, and Daniel
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