Re: [sumo-user] Some ideas and proposals for repeated routes

[Tripplanner Mumbai <tripplanner.dr@xxxxxxxxx>]

Hello Jakob,

I understand your concern regarding the change or addition of new classes. It is absolutely fine till things are working, especially with backward compatibility. A splendid work has been done by you and your team, no doubts. We are lucky to have your advice, time to time, majority of the queries are sorted out within a day.

It is pretty nice to see renaming of the period attribute of route to cycleTime (also known as round trip time). It will be adopted and appreciated soon by the users. Just a query regarding the coexistence of end and number attributes in flow (see below). As per the current verion, both cannot be used simultaneously, is it contradictory?    

<flow id="bus_11" begin="0" number="2" period="120" departLane="best" line="11" type="bus" route="11"/>

Kudos to your team again for such evolving development of SUMO.

thanks and regards,

Dillip Rout

On Mon, 15 Jun 2020 at 22:27, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

Hello Harald,

Thanks for your suggestions

a)  I agree that using the same attribute name for two related but subtly different things is adding unnecessary confusion (I fact, confusion was recently observed).

Since the 'period' attribute of flows has a lot of history behind it I'll keep this unchanged.

However, I renamed route attribute period to 'cycleTime' (see https://github.com/eclipse/sumo/issues/7168).

b) Incidentally, I was thinking about the same thing recently and came up with this: https://github.com/eclipse/sumo/issues/7164

For an example. see https://github.com/eclipse/sumo/tree/master/tests/sumo/devices/rerouting/stops/public_transport_implicit_route

c) This is already working with the recent fix: https://github.com/eclipse/sumo/tree/master/tests/sumo/devices/rerouting/stops/public_transport_implicit_route_depot

@Dillip Rout: I generally avoid adding new input definitions as long as the existing ones can be used to achieve the desired results. Also, you may find that there is good reason in keeping the edges/stop-list separate from definition of the vehicles that run these stops (especially, when the departure times of the vehicles are not spaced regularly over the whole day).

In terms of changing ambiguous names, there is a large cost associated with changing things that have been used by many people over many years. The case of route attribute period / cycleTime is special insofar that the feature was added recently and thus will not have been widely adopted yet.

This is not to dismiss thoughts on improvements but rather to point out some of the constraints. Feel free to point out things that are confusing and/or inefficient.

regards,

Jakob

Am Mo., 15. Juni 2020 um 11:03 Uhr schrieb Harald Schaefer <fechsaer@xxxxxxxxx>:

Hello

here are some proposals for enhancing the repeated route stuff:

a) change of attribute names

     In route I would rename period to cycletime (German: Umlaufzeit)

     In flow I would rename period to headway (German: Taktzeit)

b) Can we add the repeat features to trips, if we want to specify only
the stops and not the edges or allow an empty edge list?

c) If I want to simulate a whole day, I need also the links to the depot
in the morning and evening

The definition in the testcase
tests/sumo/rail/tramwayLoop/input_routes.rou.xml old (it has no
intermediate edges)

   <trip id="tram1" depart="01" departLane="best" departSpeed="max"
from="Tdepot_1" to="Tdepot_1" type="RB628">
     <stop busStop="leftStop" duration="20"/>
     <stop busStop="rightStop" duration="20"/>
     <stop busStop="leftStop" duration="20"/>
     <stop busStop="rightStop" duration="20"/>
     <stop busStop="leftStop" duration="20"/>
   </trip>

might look in the future

   <route id="startLeft" from="Tdepot_1" to="Tdepot_1" type="RB628">
     <repeat count=2 cycletime=600>
       <stop busStop="leftStop" duration="20"/>
       <stop busStop="rightStop" duration="20"/>
       <stop busStop="leftStop" duration="20"/>
     </repeat>
   </route>
   <flow id="tram1" begin="1" end="300" departLane="best"
departSpeed="max" route="startLeft" headway="120"/>

What do you think?

Greetings,

Harald

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