Re: [sumo-user] Vehicles stopping instead of going through intersections

[Richard Tasgal <tasgal@xxxxxxxxx>]

I added the additional (non-standard) lane-to-lane connections after I was getting the problem with vehicles stopping at an intersection rather than entering an available lane. I'm attaching a picture with a similar problem when the road network has typical allowed lane-to-lane connections. The vehicles entering from the right want to turn to their left (from our perspective, down). I can see why cars are stopped before an intersection when the lane they are in forbids turning into the lane that happens to be open. The cars are not choosing to change into the lane that allows the turn they want to take. 

You may very well be correct that the cars have decided in advance to enter the lane that is filled. However, my observations from the further downstream behavior seem to show that in many of these cases there is no good reason for the cars to be committed to a particular outgoing lane. 

In real life, I think, most drivers would get into the unoccupied lane.

Is there a way to get vehicles to be smarter about choosing which lane to exit the intersection from?

Rich Tasgal

On Wed, Feb 5, 2020 at 5:06 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

The define connection layout does not conform to the simulation standard: As a general rule, connections from the same edge should not target the same lane. (Netedit makes you hold down a special key to make you aware of this).

In the case of cars coming from the morth, most likely they have determined to use the connection to the second-from-right westbound lane (which is full) for strategic reason further down their route (it's hard to tell without running the scenario). That connection should not be available from the right lane of the northern inbound road.

regards,

Jakob

Am Mi., 5. Feb. 2020 um 14:08 Uhr schrieb Richard Tasgal <tasgal@xxxxxxxxx>:

In many of my simulations it seems that gridlock is worse than it needs to be (and probably worse than in real life) because often vehicles stop at an intersection and wait much longer than necessary even though there is an empty outgoing lane available to them. For example, in the attached picture, cars coming from the top are waiting an excessively long time to turn to their right (our left) even though there are outgoing lanes open to them. 

The intersections are of type priority, and all the roads are the equal priority. 

I hope the allowed turns and the cars' turning signals are sufficiently visible.

Thanks in advance for any help.

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