Thank Jacob. Actually I already deleted the internal links. So it looks weird 
to me there exists such a vehicle in the end of the eastbound lane.

To prevent this, can we work around by first checking the free space on target 
lane before letting vehicles enter the intersection? Do you think it is 
feasible?

Best,
Hao

> On Nov 14, 2019, at 04:08, Jakob Erdmann <[email protected]> wrote:
> 
> There is no way to completely prevent this time of blockage where a vehicle 
> cannot exit the junction due to downstream jamming. 
> If your simulation is using internal links then you can set the option 
> --ignore-junction-blocker <TIME> to work around it.
> However, it doesn't look like a gridlock to me. The westbound vehicles can 
> still cross the intersection and this might allow the eastbound jam to clear.
> 
> regards,
> Jakob
> 
>> Am Di., 12. Nov. 2019 um 18:42 Uhr schrieb Hao Zhou <[email protected]>:
>> Hey sumo-users,
>> Does anyone know how to prevent the following gridlock? Note that I already 
>> omitted the internal links. But the misplaced vehicle on the eastbound lane 
>> seems to block the northbound lane. The northbound vehicle cannot move 
>> forward. 
>> 
>> How should I fix this?
>> 
>> 
>> 
>> Thanks,
>> Hao_______________________________________________
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