Если идти так, можно быстрее добраться до метро.

Because Russian often uses an impersonal pattern here.

Если идти так literally means something like If one goes this way. In natural English, that usually becomes If you go this way. The sentence is not talking about a specific named person; it gives general advice.

So these are all possible, but they differ slightly:

• Если идти так... = general, impersonal, neutral
• Если ты идёшь так... = about a specific you
• Если мы идём так... = about we

The infinitive makes the statement broader and less personal.

There is no explicit subject, but in English the most natural interpretation is often you.

Russian often leaves the subject unstated when the meaning is general or obvious from context. In this sentence:

• Если идти так = If you go this way / If one goes this way
• можно быстрее добраться = it is possible to get there faster

So yes, in practice English usually uses you, but Russian does not have to say ты or вы.

Можно is an impersonal word meaning it is possible, one can, or you can.

Using можно makes the sentence sound:

• more general
• less direct
• more neutral

Compare:

• Можно быстрее добраться до метро. = You can get to the metro faster. / It’s possible to get to the metro faster.
• Ты можешь быстрее добраться до метро. = You can get to the metro faster.
  This is more directly addressed to one person.

Russian often prefers можно + infinitive when giving general advice or stating possibility.

Here так means like this, this way, or in this manner.

In this sentence, it refers to the route or way of going. So:

• Если идти так = If you go this way

Usually the speaker is indicating a direction, path, or method somehow, either physically or from context.

Do not read так here as a strong dramatic so. It is simply pointing to a manner or route.

Here быстрее is a comparative adverb, meaning faster or more quickly.

It comes from быстро = quickly.

So:

• быстро = quickly
• быстрее = more quickly / faster

In this sentence, it modifies добраться:

• можно быстрее добраться = one can get there faster

Russian comparatives often have the same form whether English would use an adjective or an adverb, so быстрее can mean both faster and more quickly, depending on context.

Russian often leaves the comparison implicit if it is obvious from context.

So быстрее here means something like:

• faster than by another route
• faster than usual
• faster than if you went another way

English does the same sometimes:

• You’ll get there faster this way.

We understand there is some comparison, even if it is not stated directly.

Добраться до means to get to, to reach, or to make one’s way to a place, often with some sense of effort or completing the trip.

So:

• добраться до метро = to get to the metro / to reach the metro

It is a very common expression for arriving at a destination.

Some similar verbs are:

• дойти до = to walk as far as / to reach on foot
• доехать до = to get to by vehicle
• добраться до = to get to, more generally

Добраться is often a good all-purpose choice when the focus is simply reaching the destination.

The preposition до requires the genitive case, so метро is grammatically genitive here:

• до метро = to the metro / as far as the metro

A useful detail: метро is an indeclinable noun, so its form does not change across cases. That means:

• nominative: метро
• genitive: метро
• accusative: метро

Even though the word looks the same, after до it is still genitive by grammar.

Because the idea is reaching a result: successfully getting to the metro.

Добраться is perfective, so it focuses on the completed outcome:

• добраться = to get there, to reach it

That fits naturally after можно in this sentence, because the point is not the ongoing process of traveling, but the successful arrival.

An imperfective form would usually suggest process, repetition, or a different kind of meaning. Here the result is what matters.

Because идти usually refers to movement in one direction, on one occasion, or along a specific route.

That matches this sentence well:

• Если идти так... = If you go this way...

By contrast, ходить often suggests:

• repeated action
• habitual action
• movement in various directions

So Если ходить так... would sound more like If one habitually goes this way or If people go this way in general, which is less natural in this context.

Yes, Russian word order is flexible, and Если так идти is possible.

The difference is mostly one of emphasis:

• Если идти так... = neutral, common
• Если так идти... = puts a little more focus on так, meaning this way

Both can work, but Если идти так sounds very natural as a standard way to say it.

Because то is often optional in Russian conditionals.

You can say:

• Если идти так, можно быстрее добраться до метро.
• Если идти так, то можно быстрее добраться до метро.

Both are correct.

Adding то can make the structure feel a bit more clearly divided, like if ..., then ..., but Russian very often leaves it out, especially in natural everyday speech.

In isolation, так can refer either to manner or route, so a very literal reading could be if one goes like that.

But in normal context, with добраться до метро, the natural meaning is about the route:

• If you go this way, you can get to the metro faster.

So although так is broad in theory, here the sentence is understood as giving directions rather than commenting on someone’s walking style.