Usput imamo presedanje i pravimo pauzu dok čekamo prevoz.

Here usput means something like on the way, along the way, or in the meantime during the trip.

So in this sentence, it tells you that the transfer and break happen during the journey.

A useful thing to know is that usput can also mean by the way in other contexts, for example in conversation:

• Usput, kako ti je brat? = By the way, how is your brother?

So the exact meaning depends on context. In this travel sentence, on the way / during the trip is the natural reading.

Presedanje means a transfer, change of vehicles, or sometimes a layover, depending on context.

In travel language, it refers to the point where you stop one part of the trip and continue with another:

• changing buses
• changing trains
• changing planes

For example:

• Imamo presedanje u Beču. = We have a transfer/layover in Vienna.

So in your sentence, imamo presedanje means we have a transfer somewhere along the route.

Because that is a normal Serbian way to talk about travel arrangements.

Just like English says:

• We have a stop
• We have a connection
• We have a layover

Serbian often uses imati + a noun:

• imamo presedanje = we have a transfer
• imam sastanak = I have a meeting
• imamo pauzu = we have a break

So this is not strange Serbian grammar; it is a standard expression.

Yes, literally it does mean we make a break, but in Serbian this is a very normal collocation.

Praviti pauzu means:

• to take a break
• to have a break
• to stop for a break

This is one of those cases where Serbian and English use different verbs with the same noun.

Compare:

• Pravimo pauzu. = We’re taking a break.
• Napravimo kratku pauzu. = Let’s take a short break.

You may also hear other expressions, but praviti pauzu is very common and natural.

Because pauzu is in the accusative case.

The verb praviti normally takes a direct object, and direct objects are usually in the accusative:

• pravimo pauzu
• pravim plan
• pravimo ručak

The dictionary form is pauza, but after praviti it becomes:

• pauza → pauzu

This is a very common pattern in Serbian.

Because čekati takes the accusative case, and prevoz is an inanimate masculine noun.

For many inanimate masculine nouns, the accusative looks the same as the nominative:

• prevoz → prevoz
• voz → voz
• autobus → autobus

So:

• čekamo prevoz = we are waiting for transport / a ride / the connection

If the noun were animate masculine, the accusative would usually look different:

• čekam čoveka = I’m waiting for the man

So prevoz stays the same because it is inanimate.

Prevoz is a broad word. It can mean:

• transport
• transportation
• a ride
• sometimes the means of transport / connection

In this sentence, čekamo prevoz most naturally means something like:

• we’re waiting for transportation
• we’re waiting for our ride
• we’re waiting for the next connection

The exact English translation depends on the situation:

• bus/train/plane connection
• shuttle
• arranged ride
• general transportation

So prevoz is intentionally a bit general.

Here dok means while.

So:

• dok čekamo prevoz = while we wait for transport

A very important point: dok can also mean until in some contexts. The meaning depends on the sentence.

Compare:

• Dok čekamo prevoz, pravimo pauzu. = While we’re waiting for transport, we’re taking a break.
• Čekaću dok ne dođe. = I’ll wait until he comes.

So in your sentence, because both actions are happening at the same time, dok clearly means while.

Because Serbian often uses the present tense for:

• actions happening now
• general descriptions
• planned or expected events in a journey or schedule

So this sentence can sound like:

• a description of what is happening
• a description of the trip itinerary
• a natural way of explaining what happens during the trip

For example, Serbian often says things like:

• Sutra putujemo. = We’re traveling tomorrow.
• U Beogradu presedamo. = We change in Belgrade.

So the present tense does not always mean right now at this exact second. It can also describe a planned sequence naturally.

The word order is fairly flexible, but the original version sounds natural and clear.

Original:

• Usput imamo presedanje i pravimo pauzu dok čekamo prevoz.

Other possible versions:

• Imamo usput presedanje i pravimo pauzu dok čekamo prevoz.
• Dok čekamo prevoz, pravimo pauzu.
• Usput pravimo pauzu dok čekamo prevoz.

But each version changes emphasis a little.

The original sentence is good because:

• usput sets the travel context right away
• then it gives the two main actions:
  • imamo presedanje
  • pravimo pauzu
• and finally explains when the break happens:
  • dok čekamo prevoz

So yes, the order can change, but the original is smooth and natural.

Yes, it could be left out if the travel context is already obvious.

Without it:

• Imamo presedanje i pravimo pauzu dok čekamo prevoz.

That still makes sense:

• We have a transfer and we take a break while waiting for transport.

Adding usput gives extra nuance:

• it reminds you this is happening along the way
• it makes the journey context more explicit

So usput is not strictly necessary for grammar, but it adds useful meaning.

Yes. I simply means and, connecting two actions:

• imamo presedanje
• pravimo pauzu

So the structure is:

• Usput imamo presedanje
• i pravimo pauzu dok čekamo prevoz

This tells you both things are true during the trip:

1. there is a transfer
2. there is also a break while waiting

Nothing unusual is happening grammatically with i here, but it helps show the sentence is built from two coordinated parts.

A learner might notice that presedanje already suggests waiting between connections, so adding pravimo pauzu dok čekamo prevoz can feel a bit explanatory or slightly redundant.

But it is still understandable and natural enough, especially if the speaker wants to emphasize that:

• there is a transfer
• and during that waiting time, they take a break

So the sentence works well as a descriptive travel sentence, even if the two ideas are closely related.