Measuring the arrival time of vehicles at the intersection

[MohamadReza-Haghani]

Hi,

I was wondering if there is a way to measure the arrival time of vehicles at the intersection which is the time a vehicle reaches the end of the queue.

Thanks,
Reza.

[namdre]

Possibilities:

• --vehroute-output with --vehroute-output.exit-times
• place an instantInductionLoop detector at the very end of an edge

[MohamadReza-Haghani]

Thank you for your response! I think these options give me the time at which a vehicle exited an edge. They do not consider the queue that may be created at the end of an edge close to a signalized intersection. A vehicle may join the queue but exit the edge several time steps later. I was wondering if there is a way to measure the time a vehicle reaches the end of the queue on an edge.

[namdre]

I misunderstood you at first.
There is currently no such output.
You could probably derive the information from fcd-output (if the speed of a vehicle drops to 0 it has likely reached the end of a queue of some sort).
The existing outputs that deal with queues (--queue-output and <laneAreaDetector>) are only concerned with queue lengths but not with individual vehicle arrival. It would be fairly easy to extend queue-output to optionally provide vehicle ids.

[MohamadReza-Haghani]

Thank you for your options! I did not find any command in TraCI to get the ids of vehicles contributing to jam length. If I can get vehicle ids, I can measure their arrival time. Right now, I am writing a python code from scratch to identify the vehicle ids contributing to a jam. I was wondering if I can get the ids of these vehicles using a TraCI command.

[namdre]

There is currently no such TraCI function. You can retrieve all vehicles on a lane or on a laneAreaDetector but have to manually filter for speed.