kuukou no basu no noriba wo matigaenai you ni, tizu wo nikai mimasita.

This is a noun chain connected by の.

The main noun is 乗り場 = boarding place / place to get on.

Then:

• バスの乗り場 = the boarding place for a bus
• 空港のバスの乗り場 = the bus boarding place related to the airport

In Japanese, の often links nouns in a chain, and English does not always translate each の as a literal of. So the most natural English wording may be something like the airport bus boarding area, the bus stop at the airport, or similar, depending on context.

乗り場 comes from:

• 乗る = to ride / to get on
• 場 = place

So 乗り場 literally means a place for getting on.

It is commonly used for:

• bus boarding areas
• train platforms
• taxi stands
• other designated boarding points

So it focuses on where you board, not just any general stop or location.

バス停 means bus stop in a general sense.

乗り場 is often more specific: it means the place where you board. At places like airports, stations, and terminals, there may be several numbered boarding areas, so 乗り場 is often the more natural word.

So:

• バス停 = bus stop
• バスの乗り場 = the boarding area for the bus

Because 間違える is a transitive verb. It means to mistake / get something wrong / confuse something.

That means the thing being mistaken is marked with を.

So:

• 乗り場を間違える = to mistake the boarding place
• 番号を間違える = to get the number wrong
• 道を間違える = to take the wrong road / mistake the route

Even though English often uses a different structure, Japanese treats the thing mistaken as a direct object.

Because the pattern verb-negative + ように means:

so as not to...
in order not to...
to avoid...

So:

• 間違えないように = so as not to mistake it
• 忘れないように = so as not to forget
• 遅れないように = so as not to be late

The negative is not random here. It is part of the purpose expression.

Here, ように shows purpose or aim.

So the structure is:

Xないように、Yしました
= I did Y so that I would not do X

In this sentence:

• 空港のバスの乗り場を間違えないように = so as not to mistake the airport bus boarding place
• 地図を二回見ました = I looked at the map twice

Together, the idea is: I looked at the map twice so that I would not mistake the airport bus boarding place.

Yes, 間違えないために is possible, but 間違えないように is very natural here.

A helpful rough guide:

• ために often sounds a bit more direct: for the purpose of
• ように is very common when the idea is so that... / in order to avoid...

With negative verbs, ないように is especially common.

So:

• 間違えないように地図を見ました = very natural
• 間違えないために地図を見ました = also possible

Because Japanese normally puts the main verb at the end of the sentence.

The first part gives the purpose:

• 空港のバスの乗り場を間違えないように

Then the main action comes last:

• 地図を二回見ました

This is a very normal Japanese sentence pattern: [purpose/reason/etc.] + [main action verb]

二回 means twice, and 回 is the counter for times/occurrences.

In Japanese, this kind of expression usually appears before the verb.

So:

• 地図を二回見ました = natural
• 二回地図を見ました = also possible

Both mean basically the same thing. The sentence uses a very common placement: object first, then number of times, then verb.

It is read にかい.

• 二 = に
• 回 = かい

So:

• 一回 = いっかい = once
• 二回 = にかい = twice
• 三回 = さんかい = three times

Yes, the subject is omitted.

Japanese very often leaves out the subject when it is obvious from context. In a sentence like this, the understood subject is usually I.

So although the Japanese sentence does not say 私は, the meaning is still naturally understood as: I looked at the map twice...

It is the plain non-past negative form of 間違える.

Conjugation:

• dictionary form: 間違える
• plain negative: 間違えない
• polite negative: 間違えません

Because this verb is an ichidan verb, you form the plain negative by removing る and adding ない:

間違える → 間違えない

The plain form is used before grammar like ように.