optimize on maximum speed

[G358XH]

• I use the maximum speed option a lot when planning long distance trips. I then use maximum speeds between say 120 and 160 when driving long distances on the German Autobahn. I notice that using trial and error the optimal maximum speed can be found resulting in shorter trip times. Can the abrp algorithme also do this for me so I do not have to use trial and error to find this optimum myself?

[Samuel-ABRP]

If you choose the highest speed you want to drive and enable the option "Adjust speed" in speed settings, ABRP should automatically reduce the speed, if the total trip time is lower. If you find a trip, where this is not the case it can have multiple reasons as the planning is quite complex with all the details that have to be taken into account. If you post some samples here, we might be able to check what is wrong.

[Flasher]

I'm asking myself the exact same thing. I noticed that by trial and error the trip duration seems to be shortest when driving with 144 km/h in my Model 3 LR on a specific route. If I enter higher speeds (e.g. 180 km/h) the trip duration increases due to additional charging stops. I have the option to "Adjust speed" enabled, but it doesn't seem to have any effect. If you want to I can give specific examples.

Side question: is the "maximum speed" setting the actual speed, or the speed that is shown on the tachometer, i.e is the speed already corrected for over/underreporting when ABRP is connected to the car?

[G358XH]

I agree with the example from Flasher. I would then expect abrp to report back to use an average speed of 144 km/h instead of the higher speed that was entered at 180 km/h. I do not recognise this in the abrp planning results.

[G358XH]

Also can you please explain for the max speed setting if this is used in the planner as the average speed that I expect to make or the maximum speed that I find comfortable to drive? In reality with traffic and road works the real speed can fluctuate in a large range. Will abrp then use the maximum speed that I am comfortable with to choose or calculate the real speeds for each part of the trip?

Edited July 16, 2021 by G358XH

[G358XH]

 

https://abetterrouteplanner.com/classic/?plan_uuid=dfa1ca05-fcd5-4b28-bc57-a3a9a2341cde 9:32 hrs trip time with max speed set at 125 km/h

https://abetterrouteplanner.com/classic/?plan_uuid=055b5b94-cad6-4933-b49f-7b95c19f6779  9:37 hrs trip time with max speed set at 130km/h

https://abetterrouteplanner.com/classic/?plan_uuid=a337e9e3-f37f-472f-a916-7d1a5a7712dc 9:40 hrs trip time with max speed set at 140km/h

With the plannings with max speed set at 130km/h and 140km/hr I would expect abrp to suggest to reduce max speed to 125km/hr to arrive 5 and 8 minutes earlier. Why does abrp not do this as driving at 125km/h is more efficient and also less stressfull

 

 

[G358XH]

Also as trip times on a 9 and a half hour trip only differ less than 10 minutes I think abrp should explicitly make the suggestion in the planning result that reducing the max speed with  ... km/hr will only increase trip time with 10 minutes.

[Flasher]

I have the feeling the devs are not really responsive in the forum. 

[Sofia-ABRP]

Hi @Flasher and @G358XH,

I'd recomment tagging @Samuel-ABRP in your posts to notify Samuel about your updates. Since there are a lot of posts in the forums it's easy for a thread to get lost

Type @ and then the username of the user you wish to notify.

/Sofia

[Flasher]

Thanks for the hint @Sofia-ABRP. So maybe @Samuel-ABRP can have a look at @G358XH and my posts

[Samuel-ABRP]

I think this one is rather for @Jason-ABRP or @Bo-ABRP
 

[G358XH]

@Jason-ABRP @Bo-ABRP you guys are really quiet

[Ecurb]

For some reason, I am unable to to pull up the routes you shared using links.  Can you provide a start city and destination city that I can use to play with this and see the behavior (slower max speed resulting in shorter trip times) you're describing?

[G358XH]

for example Amsterdam to Milan. When I plan this route on abrp with for example maximum speeds of 140km/h and 180km/h the trip time is both 10h20m. I would expect abrp can use its algorithme to provide me with this information so I do not have to find out by trial-and-error.

 

As stated above as trip times on a 10+ hour trip only differ less than 10 minutes I think abrp should explicitly make the suggestion in the planning result that reducing the max speed with  ... km/hr will only increase trip time with 10 minutes.

Edited August 18, 2021 by G358XH

[Jason-ABRP]

Our intention with ABRP is to tailor the trip to you.  You tell us where you want to go (and how you intend to drive), we figure out how to get you there.  Telling you to drive slower or faster than you're normally comfortable driving (what you tell us in the settings) unless we really have to is counter to that goal, so we don't really want to spend the time implementing that.

It is a neat thought exercise, though.

[G358XH]

Thanks for your reaction. I understand your point of view but then please change the text with the setting for "maximum speed" to "the speed you are normally comfortable driving" since I now understand that this setting is not used as maximum speed. For myself I am comfortable driving 130-140 for the duration of the trip but the maximum speed I will drive is 160 but that will only be sustained for shorter time periods.

I hope you and the abrp team spend some more time with this thought exercise as you are correct in that many people (me too) are used to driving their normally comfortable speed without realising what benefits can be found in trip time, number of charging stops and charging costs by changing this habbit. Your abrp service can make a difference

Edited August 18, 2021 by G358XH

[Flasher]

Ok I'm using ABRP the exact opposite way. If ABRP would be telling me that I need to drive slower in order to get to my destination faster, I would totally follow this suggestion.