Hi, I'm still having troubles with this, more in just creating a congestion wave / tailback in the first place. I've got a fairly busy looking flow on a motorway section, and set change lane mode to be only for strategic. The bulk of vehicles are standard passenger, which I've defined as:
<vType id="normalVehicle" length="4.00" maxSpeed="40.00" guiShape="passenger" speedFactor="1.3" tau="2"/> And I'm inserting into fast lane at 40, next lane at 35, and other lane at 28. So, there's a mix of speeds, going quite fast. I have one vehicle selected which I have pre-planned to brake hard - for about 6 seconds it receives traci command to change speed to 1m/s, and then resumes to -1. Somewhat exagerated, but I was aiming for that sort of 'sudden braking causes a ripple of other vehicles braking' behaviour. The problem is.. the rest of the vehicles are just too good! It seems to me on the roads in the UK, if someone went from 40m/s to 1m/s there would be someone behind not paying attention, and either crash, or have to brake even harder.. So I'm wondering, is it just that I need to experiment with tau, max decel? Does sigma play some part? Reduce mingap? Or, is such behaviour just not possible with current model(s)? Thanks! Quoting "v.f.baines" <v.f.bai...@bath.ac.uk>: > Hi All, > > I'd like to implement some sort of repeatable congestion / traffic > wave scenario. I've created a decent volume of background traffic > using flows. If a vehicle now brakes suddenly or moves lanes > suddenly (typical cases I can think of which seem to start ripple > waves) should/would this impact the flow of the rest of the vehicles? > > I'm guessing this sort of scenario might have already been > implemented a few times so any pointers welcome. > > Also, any best practise for measuring the impact? At the moment ive > placed 5 detectors along the route which give a measure of vehicle > speed, so in congestion I'd expect this to drop. I guess time > between detections x detected speed would indicate vehicles gap > (assuming no lane change), small gap indicating congestion? > > Again, any suggestions welcome > > Thanks! > ------------------------------------------------------------------------------ > Managing the Performance of Cloud-Based Applications > Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > Read the Whitepaper. > http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk > _______________________________________________ > sumo-user mailing list > sumo-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sumo-user ------------------------------------------------------------------------------ Android apps run on BlackBerry 10 Introducing the new BlackBerry 10.2.1 Runtime for Android apps. Now with support for Jelly Bean, Bluetooth, Mapview and more. Get your Android app in front of a whole new audience. Start now. http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk _______________________________________________ sumo-user mailing list sumo-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sumo-user
