El autobús tarda veintidós minutos en llegar al campus si no hay tráfico.

In Spanish, nouns usually need an article more often than in English.

Here, el autobús can mean:

• a specific bus already understood from context, or
• the bus as a service/route in a general sense

So El autobús tarda veintidós minutos... is a very natural way to say The bus takes twenty-two minutes...

Spanish normally does not drop the article as easily as English does.

Tarda is the he/she/it form of tardar in the present tense.

In this sentence, tardar means to take a certain amount of time.

So:

• El autobús tarda veintidós minutos = The bus takes twenty-two minutes

A very common pattern is:

• tardar + amount of time + en + infinitive

For example:

• Tardo diez minutos en llegar. = It takes me ten minutes to arrive.

Because with tardar, the amount of time comes directly after the verb.

So Spanish says:

• tarda veintidós minutos

not:

• tarda en veintidós minutos
• tarda por veintidós minutos

The basic pattern is:

• [subject] + tardar + time expression + en + infinitive

Example:

• El tren tarda una hora en llegar.

After tardar, Spanish often uses en + infinitive to say to do something or in doing something.

So:

• tarda veintidós minutos en llegar = it takes twenty-two minutes to arrive

This is the standard structure:

• tardar + time + en + infinitive

More examples:

• Tardo cinco minutos en vestirme.
• Tardamos media hora en comer.

Using para llegar here would sound less natural after tardar.

Because a + el contracts to al in Spanish.

So:

• a + el campus → al campus

This contraction is required almost all the time.

Compare:

• Voy al campus.
• Llegamos al centro.

But there is no contraction with la:

• a la universidad
• a la estación

Hay is the form of haber used to mean there is or there are.

So:

• hay tráfico = there is traffic
• no hay tráfico = there isn’t any traffic

Spanish uses hay to talk about the existence of something, not ser or estar.

So these would be wrong here:

• no está tráfico
• no es tráfico

Because tráfico is being used in a general, uncountable sense, like traffic in English.

So Spanish says:

• hay tráfico
• no hay tráfico

not normally:

• hay el tráfico

After hay, Spanish often leaves out the article when talking about something non-specific or general.

But an article can appear if the noun is specific:

• No soporto el tráfico de Madrid.
• El tráfico de esta zona es horrible.

They are different words:

• si = if
• sí = yes or sometimes himself/herself/itself in certain expressions

In your sentence:

• si no hay tráfico = if there is no traffic

The word here has no accent because it is the conditional word if.

Yes. That is completely natural.

You can say:

• El autobús tarda veintidós minutos en llegar al campus si no hay tráfico.
• Si no hay tráfico, el autobús tarda veintidós minutos en llegar al campus.

Both mean the same thing.

A useful punctuation point:

• If the si clause comes first, Spanish usually uses a comma.
• If it comes second, it usually does not.

Because the stress falls on the last syllable: veintidós.

Among the numbers in the twenties, these three have written accents:

• veintidós
• veintitrés
• veintiséis

That accent mark shows the correct stress and is part of the standard spelling.

An approximate pronunciation for English speakers is:

• vein-tee-DOS

though the real Spanish pronunciation is smoother and more connected.

Yes. Campus is used in Spanish too, especially in education.

In standard usage, it is usually masculine:

• el campus
• al campus

Its form does not change in the singular:

• el campus

The plural is also commonly los campus, although in some formal contexts you may also see Latin-style discussion of the word. For everyday Spanish, el campus / los campus is perfectly normal.