Phrasal verbs Related to Travel

The rule is:

If you can walk onto it and stand up inside, you say “get on”. If not, you say “get in”

To illustrate, let’s list out some other methods of transportation:

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Get in a car

Get in a taxi

Get in a truck

Get in a van

These are all vehicles we cannot stand up inside (for a truck, we cannot stand up inside the part where we drive; if you’re talking about the back, you could say “get on the truck”)

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Get on a bus

Get on a train

Get on an airplane

For all these, you can walk onto them and stand up inside them.

Resource:https://intensiveenglishuiu.com/2015/09/12/get-in-a-car-vs-get-on-a-bus-why/