Depois do pedágio, a senhora vai ver uma placa azul perto do farol.

Because do is the contraction of de + o.

• depois de = after
• o pedágio = the toll / the toll booth

So:

• depois de o pedágio → contracts to depois do pedágio

This kind of contraction is very common in Portuguese:

• de + o = do
• de + a = da
• de + os = dos
• de + as = das

In driving/travel contexts, pedágio can refer to:

• the toll itself (the fee)
• the toll booth / toll plaza / toll point

In a sentence like this, depois do pedágio usually means after the toll booth / after passing the toll area, not just after paying the money in an abstract sense.

A senhora is a polite, formal way to say you when speaking to a woman.

It is common in Brazilian Portuguese when:

• being respectful
• speaking to someone older
• using customer-service or formal language
• giving directions politely

So a senhora is like a formal you, while você is more neutral and everyday.

Because a senhora takes third-person singular verb forms in Portuguese.

Even though it means you, grammatically it behaves like she.

So:

• a senhora vai
• not a senhora vais

This is the same pattern as:

• você vai
• o senhor vai

Formal you forms in Portuguese usually use third-person verbs.

Vai ver is the very common near future structure in Brazilian Portuguese:

• ir + infinitive

So:

• vai ver = will see / is going to see

This is often more natural in everyday speech than the simple future:

• verá

Both are correct, but they feel different:

• a senhora vai ver = very common, conversational, natural
• a senhora verá = correct, but more formal or written

In Portuguese, adjectives usually come after the noun.

So:

• placa azul = blue sign
• carro vermelho = red car
• casa grande = big house

Putting the adjective before the noun is sometimes possible, but it is less common and can sound poetic, emphatic, or change the nuance. In this sentence, placa azul is the normal order.

Here, placa means a sign or road sign.

The word placa can mean different kinds of signs or plates depending on context, such as:

• a road sign
• a plaque
• a license plate (placa do carro)

In this sentence, because we are talking about directions on the road, uma placa azul means a blue sign.

Yes. Farol has more than one possible meaning in Portuguese, depending on context.

Common meanings include:

• lighthouse
• headlight
• in some contexts, some speakers also use it for traffic light, although semáforo or sinal is more standard for that

So the exact meaning depends on the situation. In a road-direction sentence, learners often need context to know which one is intended.

Because Depois do pedágio is an introductory phrase.

The comma helps separate the setup from the main clause:

• Depois do pedágio, = the time/place reference
• a senhora vai ver... = the main statement

In short sentences, the comma is sometimes a style choice, but here it is very natural and helps readability.

Yes. In this expression, a senhora is the normal form.

You usually say:

• a senhora
• o senhor

not just senhora or senhor when they mean formal you as the subject of a sentence.

So:

• A senhora vai ver... = correct
• Senhora vai ver... = not the normal structure for this meaning

No. It does not simply mean old woman.

It is mainly a respectful or formal way to address a woman. It can be used for:

• an older woman
• a customer
• a stranger
• someone you want to address politely

That said, because it can sound formal or age-marked in some situations, younger women may prefer você in casual contexts.

Uma is the feminine singular form of the indefinite article a/an.

Since placa is a feminine noun, it uses:

• uma placa = a sign

Compare:

• um carro = a car masculine
• uma placa = a sign feminine

So the article agrees with the gender of the noun.

You usually learn the gender together with the noun’s article:

• a placa
• o pedágio
• o farol

There are patterns that help, but they are not perfect. For example:

• nouns ending in -a are often feminine: placa
• nouns ending in -o are often masculine: farol is masculine even though it does not end in -o
• pedágio is masculine: o pedágio

The safest habit is to memorize nouns with their article.

The accent shows the stressed syllable and is part of the correct spelling.

Pedágio is stressed on dá:

• pe-DÁ-gio

Without the accent, the spelling would be wrong. In Portuguese, accents are important because they can affect:

• pronunciation
• stress
• sometimes meaning

So yes, the accent matters.