Hello, from a first look at the scenario I would say that the collisions are a result of the emergency stops and the emergency stops are caused by a mismatch between road speed and yellow phase times. There is a large number of inner city roads that are assigned a speed of 25m/s but the duration of yellow phases at traffic lights is set to 3s. This doesn't give vehicles enough time to brake before the light switches to red.
The actual speed of these roads seems to be 13.89m/s (from checking a few samples of original osm data) and for that speed the yellow durations would be ok. I also noticed that the number of lanes for these roads was greatly increased from their real world values (from 1 lane per direction to 3 lanes per direction in some cases). Lowering road speeds would be the obvious solution (changing all roads with 25m/s to 13.89m/s eliminated all emergency stops for me). regards, Jakob 2016-07-26 21:01 GMT+02:00 Matěj Kubička <[email protected]>: > Hello SUMO developers, > > thanks to Lara's hard work and a little help from me a new version of > the LuST scenario is available online. Things have generally improved - > traffic is fluider, simulation runs faster. > > However, there are some things that SUMO does that I don't understand: > the simulations generate unusually high number of collisions and > emergency stops (both are in hundreds); see > https://github.com/lcodeca/LuSTScenario/blob/master/docs/LuSTFiles.md > > Could you take a look at some of them to see why is there so many? > > Thank you, > ---> Matej > > > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and > traffic > patterns at an interface-level. Reveals which users, apps, and protocols > are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning > reports.http://sdm.link/zohodev2dev > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
