En esa carretera no conviene adelantar, aunque tengas prisa por llegar al aeropuerto.

Here conviene means something like it is advisable, it is a good idea, or it is wise.

So:

• No conviene adelantar = It’s not advisable to overtake / pass

Spanish often uses convenir in an impersonal way:

• Conviene esperar. = It’s advisable to wait.
• No conviene discutir ahora. = It’s not a good idea to argue now.

In this sentence, there is no specific person as the subject. It is a general statement about what is wise or unwise.

Because after conviene, Spanish often uses an infinitive to say what is or isn’t advisable.

Pattern:

• conviene + infinitive
• no conviene + infinitive

Examples:

• Conviene salir temprano. = It’s advisable to leave early.
• No conviene comer tanto. = It’s not a good idea to eat so much.

So:

• No conviene adelantar = It’s not advisable to overtake

The infinitive works much like English to + verb or a bare verb phrase such as to overtake / overtaking depending on how you translate it.

In road/driving contexts, adelantar means to overtake or to pass another vehicle.

So on a road:

• adelantar a un coche = to overtake/pass a car
• Está prohibido adelantar. = Overtaking is forbidden.

Outside driving, adelantar can have other meanings too, such as:

• to move forward
• to bring something forward in time
• to advance

But in En esa carretera no conviene adelantar, the road context makes the driving meaning clear.

Because aunque can be followed by either the subjunctive or the indicative, depending on the meaning the speaker wants.

Here, aunque tengas prisa uses the subjunctive because it means something like:

• even if you’re in a hurry
• even though you may be in a hurry

It presents the hurry as something that does not change the advice.

So:

• aunque tengas prisa = even if you are in a hurry

This is a very common use of aunque + subjunctive.

The difference is subtle but important.

Aunque + subjunctive

• aunque tengas prisa
• suggests even if you are in a hurry
• the speaker is treating it more as a possibility, concession, or something irrelevant to the advice

Aunque + indicative

• aunque tienes prisa
• suggests although you are in a hurry
• the speaker treats the hurry as a known, real fact

In this sentence, the subjunctive fits very naturally because the point is:

Overtaking is not advisable, regardless of whether you’re in a hurry.

Both forms can be grammatical in the right context, but aunque tengas prisa sounds more like a general warning.

Tengas is the present subjunctive form of tener, for tú.

The verb tener is irregular:

Present indicative

• yo tengo
• tú tienes

Present subjunctive

• yo tenga
• tú tengas
• él/ella tenga

So in this sentence:

• aunque tengas prisa

the subject is an implied tú: even if you are in a hurry.

Because Spanish expresses to be in a hurry as to have hurry:

• tener prisa = to be in a hurry

This is just the standard Spanish expression.

Examples:

• Tengo prisa. = I’m in a hurry.
• ¿Tienes prisa? = Are you in a hurry?
• Aunque tengas prisa... = Even if you’re in a hurry...

English and Spanish often build these ideas differently. English uses be, while Spanish uses tener.

Because tener prisa por + infinitive is the normal pattern when you mean to be in a hurry to do something.

So:

• tener prisa por salir = to be in a hurry to leave
• tener prisa por llegar = to be in a hurry to arrive

Using para here would not sound natural in standard Spanish.

A useful pattern to remember is:

• tener prisa por + infinitive

It explains what the hurry is about.

• tengas prisa = you are in a hurry
• tengas prisa por llegar al aeropuerto = you are in a hurry to get to the airport

So por llegar al aeropuerto modifies prisa, specifying the goal or reason for the hurry.

Because a + el contracts to al in Spanish.

So:

• a + el aeropuerto → al aeropuerto

This contraction is mandatory.

The only common similar contraction is:

• de + el → del

Examples:

• Voy al aeropuerto. = I’m going to the airport.
• Vengo del aeropuerto. = I’m coming from the airport.

En esa carretera means on that road.

It sets the scene first: the sentence tells you where the advice applies.

Spanish often places this kind of location phrase at the beginning for emphasis or clarity:

• En esa carretera no conviene adelantar...

You could also rearrange the sentence:

• No conviene adelantar en esa carretera...

That is also grammatical, but the original version foregrounds the road itself.

Esa means that, while esta means this.

So:

• esta carretera = this road
• esa carretera = that road

Using esa suggests the road is being referred to as something a bit removed from the speaker, or already identified in the conversation.

For a learner, the main point is simply:

• esa carretera = that road

Yes, you could, and the meaning would be very similar.

No conviene adelantar

• very natural
• concise
• common in advice/warnings

No es conveniente adelantar

• also correct
• slightly more formal or explicit

In everyday Spanish, no conviene sounds very idiomatic.

Yes, but the meaning changes slightly.

No conviene adelantar

• It’s not advisable
• It’s not wise
• softer, advice-based

No debes adelantar

• You shouldn’t overtake
• stronger, more direct
• can sound more like instruction or obligation

So the original sentence gives advice rather than a strict command.

Yes, in the second part there is an implied tú:

• aunque tengas prisa = even if you are in a hurry

Spanish often leaves subject pronouns out because the verb form already shows the person.

So tengas tells us the subject is tú.

In the first part, no conviene adelantar, there is no personal subject in the same way. That part is impersonal: it’s not advisable to overtake.

It can feel like both, but grammatically it is mainly a general piece of advice.

• No conviene adelantar is impersonal and general.
• aunque tengas prisa brings in a more direct you.

So the sentence sounds like a warning addressed to someone, but phrased as a general truth:

On that road, overtaking is not advisable, even if you’re in a hurry to get to the airport.

That combination is very natural in Spanish.