4. By
is also used
for transportation environment or
the surface like; sea, road, air. So even
when you’re not talking a particular
vehicle in particular, you can also use the
preposition “by” to talk about
transportation surface.
5. example
I went by the sea.
We are traveling to Bangkok
by the road.
They are going to go by the air.
6. In
Used in vehicles that we can sit in but we
cannot stand in.
In a Car, in a truck, in a helicopter, in a
taxi, in a rowboat etc. You can not stand
in this vehicle especially when they are in
motion, so the vehicles that you can sit
inside, you will end up using the
preposition in.