Is maxSpeed the physical limit? Does that mean speedFactor is usally taken
less than 1?

On Wed, Jul 3, 2019 at 1:41 PM rony gracious <[email protected]> wrote:

> So edge speed is configured in network file?
>
> What is default tls-penalty in meso if junction control is true? On what
> is this time penalty applied? Does it change the headway accordingly if
> junction control is true? Even if a meso-taujf is explicitly mentioned?
>
> On Mon, Jul 1, 2019 at 8:19 PM Jakob Erdmann <[email protected]>
> wrote:
>
>> edge speeds refer to the 'speed' attribute of the edge which typically
>> corresponds to the legal speed limit.
>> MaxSpeed is a global speed limit for the vehicle. You could use this to
>> model maximum desired speed but it would then be independent of the speed
>> limit. For this reason the desired speed is often expressed in terms of the
>> speedFactor (speedLimit * x) and maxSpeed is taken as the physical limit of
>> the vehicle/engine.
>>
>> Am Mo., 1. Juli 2019 um 16:00 Uhr schrieb rony gracious <
>> [email protected]>:
>>
>>> What are these edge speeds mentioned here. How do I configure these edge
>>> speeds? Are they same as maxSpeed in vType?
>>>
>>> "A vehicle keeps its chosen speed multiplier for the whole simulation
>>> and multiplies it with edge speeds to compute the actual speed for driving
>>> on this edge. Thus vehicles can exceed edge speeds. However, vehicle speeds
>>> are still capped at the vehicle type's *maxSpeed*."
>>>
>>> On Mon, Jul 1, 2019 at 2:24 PM Jakob Erdmann <[email protected]>
>>> wrote:
>>>
>>>> vType does work in meso. Some microsim-specifics values such as
>>>> acceleration are simply ignored.
>>>>
>>>> Am Mo., 1. Juli 2019 um 09:56 Uhr schrieb rony gracious <
>>>> [email protected]>:
>>>>
>>>>> If vType does not work in meso how do I change the max speed, speed
>>>>> deviations in meso? Or does the values given in vType work for meso?
>>>>>
>>>>> On Thu, Jun 20, 2019 at 4:05 PM Jakob Erdmann <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> meso vehicles always drive at yellow it the current implementation so
>>>>>> increasing amber takes no effect.
>>>>>> With switching, I mean phase-switching. (And everytime you switch
>>>>>> phases there is some 'cost' because traffic across the intersection must
>>>>>> stopped for safety reasons).
>>>>>>
>>>>>> Am Do., 20. Juni 2019 um 10:43 Uhr schrieb rony gracious <
>>>>>> [email protected]>:
>>>>>>
>>>>>>> Would increasing the amber time between the green phases have the
>>>>>>> same effect?
>>>>>>> What do you mean by switching? I was optimizing changing the stage
>>>>>>> times after every simulation.
>>>>>>>
>>>>>>> On Thu, Jun 20, 2019 at 1:17 PM Jakob Erdmann <[email protected]>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Meso vehicles do not suffer from start-up delays the way micro
>>>>>>>> vehicles do.
>>>>>>>> To model the cost of switching, Modify, the traffic cycle so that
>>>>>>>> are all-red phases of sufficient length when switching between the 
>>>>>>>> green
>>>>>>>> phases.
>>>>>>>> This way, shorter cycle times will definitely reduce capacity.
>>>>>>>>
>>>>>>>>
>>>>>>>> Am Do., 20. Juni 2019 um 07:02 Uhr schrieb rony gracious <
>>>>>>>> [email protected]>:
>>>>>>>>
>>>>>>>>> Why does when i calculate average delay at any junction in meso
>>>>>>>>> its always lower the cycle time lower the delay? If thats the case 
>>>>>>>>> there is
>>>>>>>>> no way i can optimize using meso?
>>>>>>>>>
>>>>>>>>> On Wed, May 29, 2019 at 5:52 PM rony gracious <[email protected]>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Thanks. I will check this out.
>>>>>>>>>>
>>>>>>>>>> On Wed, May 29, 2019 at 5:39 PM Jakob Erdmann <
>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>
>>>>>>>>>>> In meso, vehhicles don't have to lane-change in order to use the
>>>>>>>>>>> correct turning lane. In the sumo microsimulation, lanechanging 
>>>>>>>>>>> does play a
>>>>>>>>>>> role and and can impede traffic. You can check whether it makes a
>>>>>>>>>>> difference if you set vehicle attribute departLane="best" so 
>>>>>>>>>>> vehicles enter
>>>>>>>>>>> the simulation already on the correct lane.
>>>>>>>>>>>
>>>>>>>>>>> Also, meso vehicles depart with maximum speed. To get the same
>>>>>>>>>>> effect in sumo set departSpeed="max".
>>>>>>>>>>>
>>>>>>>>>>> Am Mi., 29. Mai 2019 um 14:04 Uhr schrieb rony gracious <
>>>>>>>>>>> [email protected]>:
>>>>>>>>>>>
>>>>>>>>>>>> 2 two lane edges towards the junction and two three lane ones.
>>>>>>>>>>>> Vehicle count is around 20 - 60k in different approaches.
>>>>>>>>>>>>
>>>>>>>>>>>> On Wed, 29 May 2019, 5:31 pm Jakob Erdmann, <
>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> It may help to observe both simulations closely in sumo-gui to
>>>>>>>>>>>>> see if there is an obvious difference in behavior indicating a 
>>>>>>>>>>>>> problem in
>>>>>>>>>>>>> either of the simulations.
>>>>>>>>>>>>> How large is your scenario in terms of
>>>>>>>>>>>>> intersections,edges,vehicle count?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Am Mi., 29. Mai 2019 um 10:55 Uhr schrieb rony gracious <
>>>>>>>>>>>>> [email protected]>:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> The flow given was same for both 5 hour simulation. But when
>>>>>>>>>>>>>> I take count for every 30 minutes that's where the difference 
>>>>>>>>>>>>>> is. The last
>>>>>>>>>>>>>> vehicle in sumo enters 2 hours after the last vehicle in meso 
>>>>>>>>>>>>>> entered.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Yes. Sorry. I meant junction control.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Wed, 29 May 2019, 12:30 pm Jakob Erdmann, <
>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> It's hard to answer this generally. Meso and miro are
>>>>>>>>>>>>>>> different models so there will be many situations in which they 
>>>>>>>>>>>>>>> produce
>>>>>>>>>>>>>>> different results.
>>>>>>>>>>>>>>> You first have to figure out whether the sumo flow is too
>>>>>>>>>>>>>>> low (e.g. due to road nework problems) or whether the the meso 
>>>>>>>>>>>>>>> flow is too
>>>>>>>>>>>>>>> high (which can be due to the used options).
>>>>>>>>>>>>>>> There is no meso option called tl-logic (but there is one
>>>>>>>>>>>>>>> for tls and one for junction control) so you need to be more 
>>>>>>>>>>>>>>> precise on the
>>>>>>>>>>>>>>> used option.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards,
>>>>>>>>>>>>>>> Jakob
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Am Mi., 29. Mai 2019 um 07:47 Uhr schrieb rony gracious <
>>>>>>>>>>>>>>> [email protected]>:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> For the same flow sumo is taking around 2 hours of extra
>>>>>>>>>>>>>>>> simulated time then meso which accounts for this extra counts.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Wed, May 29, 2019 at 11:02 AM rony gracious <
>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> While I run meso for a 5 hour simulation with loop
>>>>>>>>>>>>>>>>> detectors placed there is a considerable difference in 
>>>>>>>>>>>>>>>>> vehicle count from
>>>>>>>>>>>>>>>>> when I do the same with sumo. When I took vehicle count every 
>>>>>>>>>>>>>>>>> 30 minutes
>>>>>>>>>>>>>>>>> meso had atleast 100 vehicles more than sumo in each time 
>>>>>>>>>>>>>>>>> step of 30
>>>>>>>>>>>>>>>>> minutes.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Can anyone tell me why that is and how I can get more
>>>>>>>>>>>>>>>>> closer to a sumo SIM with meso. The only parameters I am 
>>>>>>>>>>>>>>>>> using is mesosim
>>>>>>>>>>>>>>>>> true and meso tl logic true which is in mesoscopic.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Rony Gracious
>>>>>>>>>>>>>>>>>
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