2 km on a bicycle?
No way today. Far too exhausting.
In the village kids on bicycles have become a rare sight.
Instead they have all kinds of electric scooters. Not roadworthy.
For the bigger distance to secondary school there is a "bus" (truck built as a songthaeo). One or two in the morning.
If you want the full traffic madness: look at a provincial capital like Udon where an armada of cars, SUVs and kids on pillion carts the students to the big secondary schools.