Lately I noticed some interesting foodtrucks appear around lunchtime office hours in Taipei city area.
How does one know when they will appear?
Is there a a Line group where they all hang out?
Or do you have to follow them all one by one on Facebook?
Good question. All I know is the curry truck comes on Friday.
https://www.1bite2go.com/en/location/food-truck
Used to be the truck parked in the driveway of the Ambassador Hotel on Zhongshan North Road (near/across from Mackay Hospital) for a few days a week MTW and then the rest of the week at the Nangang Software Park behind Building F. But I am not sure anymore.
You could call the number +886 2 2722 6528 and check its schedule
Is there a Food Truck Locator app or other online app that is useful in Taiwan?
Something that all food trucks use to inform others of their location and maybe something that notifies you automatically if you happen to be near one.
I heard there is a traveling-food-truck night market with over 12 trucks that moves around somewhere.
Maybe something like this.
There is apparently a food truck in Seattle area named “Made in Taiwan” 
And one in LA area named “Taiwan Sausage Bei”.
Did you find where they gather on weekends in the North? I kinda know where they will be in Kao, must be some common gathering areas up North too
