This is like closed issue #3. The difference is that in issue #3 100% of vehicles coming from a particular source vanished. In this case vehicles only vanish when they do not find an opportunity to change to the lane that is required to reach their destination.
Conservation of flow is fundamental in traffic theory; so a traffic simulator should not exhibit vanishing vehicles (except at destinations).
A possible solution might be to make vehicles stop (and block traffic coming from behind) just before running out of space for a required lane change.
This is like closed issue #3. The difference is that in issue #3 100% of vehicles coming from a particular source vanished. In this case vehicles only vanish when they do not find an opportunity to change to the lane that is required to reach their destination.
Conservation of flow is fundamental in traffic theory; so a traffic simulator should not exhibit vanishing vehicles (except at destinations).
A possible solution might be to make vehicles stop (and block traffic coming from behind) just before running out of space for a required lane change.