mokutekiti made no douro wo tizu de sirabetan desu ga, mada sukosi huan desu.

Literally, it is:

• 目的地 = destination
• まで = up to, as far as
• の = links the phrase to the next noun
• 道路 = road, roadway

So 目的地までの道路 literally means the road or roads up to the destination.

In natural English, though, this often comes out as the route to the destination. Japanese often uses a more concrete noun like 道路 where English would prefer route.

Also, 道路 does not show singular vs. plural clearly, so it could mean one road or several roads depending on context.

まで marks the endpoint, so 目的地まで means up to the destination or as far as the destination.

Then の turns that whole phrase into something that can modify a noun:

• 目的地まで = to the destination
• 目的地までの道路 = the road or roads to the destination

This is a very common pattern:

• 駅までの道 = the way to the station
• 家までの距離 = the distance to home

So までの is working like to or leading to in English.

Because 調べる takes a direct object, and the thing being checked is 道路.

So:

• 道路を調べる = to check the road or route

Here, the speaker checked the road or route, so を marks that thing as the object of the verb.

A useful contrast is:

• 道路を = the thing being checked
• 地図で = the tool used to check it

Here, で marks the means or tool.

So 地図で調べる means to check by using a map.

In natural English, you might translate it as check on a map, but grammatically Japanese is treating the map as the instrument used to do the checking.

This use of で is very common:

• ペンで書く = write with a pen
• バスで行く = go by bus
• スマホで調べる = look it up on a smartphone

So 地図で is not really about location here. It is about means.

調べたんです is made from:

• 調べた = checked, looked up
• んです = a conversational form of のです

The んです part adds an explanatory or background-giving nuance. It often sounds like:

• here is the situation
• this is what I did
• given that, here is how I feel

So 調べたんですが has a natural flow like:

I checked it on a map, but...

If you say 調べましたが, that is also grammatical, but it sounds a bit more plain and matter-of-fact. 調べたんですが feels more conversational and more connected to the following statement about being uneasy.

Here, が means but or though.

It connects the two parts:

• 目的地までの道路を地図で調べたんですが
• まだ少し不安です

So the overall structure is:

I checked the route to the destination on a map, but I am still a little uneasy.

This が is a very common way to make a softer contrast. Compared with けど, it can sound a little more formal or polite.

Here, まだ means still.

So:

• まだ少し不安です = still a little uneasy

まだ can mean either still or not yet, depending on the sentence.

For example:

• まだ不安です = I am still uneasy
• まだ行っていません = I have not gone yet

In this sentence, because it is describing a continuing feeling, still is the correct sense.

少し means a little or slightly, and it modifies the feeling of uneasiness.

So:

• 少し不安です = a little uneasy

Adding まだ gives:

• まだ少し不安です = still a little uneasy

This is a very natural way to soften the statement. It sounds less strong than simply saying 不安です.

Yes, but grammatically it is a na-adjective or adjectival noun.

That is why it behaves a little differently from an i-adjective.

Examples:

• 不安です = uneasy, anxious
• 不安な気持ち = uneasy feelings

Before a noun, it takes な:

• 不安な人 = an anxious person

Before です, it can appear directly as 不安です.

So in English it works like an adjective, but in Japanese its grammar is that of a na-adjective.

Because Japanese very often leaves out the subject when it is clear from context.

In this sentence, the understood subject is naturally I:

• I checked the route on a map, but I am still a little uneasy

Adding 私は is possible, but it is usually unnecessary unless you want emphasis, contrast, or extra clarity.

For example:

• 私はまだ少し不安です = As for me, I am still a little uneasy

Without 私は, the sentence sounds more natural in ordinary conversation.

Literally, 道路 means road or roadway, but in this context English usually prefers route.

So although the Japanese says roads to the destination, a natural English understanding is:

• the route to the destination
• which roads to take

This is a good example of how Japanese and English do not always package the same idea in exactly the same way. Japanese can be more concrete, while English may use a more abstract word like route.