Na tej autostradzie prędkość jest często zbyt duża.

Literally, it means On this motorway.

A more word-for-word breakdown is:

• na = on
• tej = this
• autostradzie = motorway / highway, in the form required after na

In natural English, you would often translate the whole phrase more loosely as On this motorway or On this highway.

Because Polish normally uses na for many kinds of surfaces, routes, and public thoroughfares, including:

• na ulicy = on the street
• na drodze = on the road
• na autostradzie = on the motorway

Using w here would sound wrong, because w usually means in/inside. A motorway is understood as a route you travel on, not a container you are inside.

Because after na when it means location, Polish uses the locative case.

So:

• ta autostrada = this motorway (basic dictionary form, nominative)
• na tej autostradzie = on this motorway (locative after na)

Both the adjective and the noun change:

• ta → tej
• autostrada → autostradzie

Here it most naturally means this.

The basic demonstrative set is:

• ten = this (masculine)
• ta = this (feminine)
• to = this (neuter)

Because autostrada is feminine, the base form is ta.

In context, Polish demonstratives can sometimes overlap a bit with English that or even just a more specific the, but for a learner, tej autostradzie is best understood as on this motorway.

Here prędkość means speed in the general sense: the speed at which people are travelling.

So the sentence means something like:

• speeds on this motorway are often too high
• people often drive too fast on this motorway

It does not normally mean speed limit. If you wanted to say speed limit, Polish would usually say:

• ograniczenie prędkości = speed limit

In this sentence, jest is the normal and correct form of to be:

• prędkość jest zbyt duża = the speed is too high

In standard Polish, you generally do not omit jest in a normal sentence like this.

If you removed it:

• Na tej autostradzie prędkość często zbyt duża

that would sound incomplete, like a headline, note, or very compressed style, not a regular full sentence.

This is a very common learner question.

Polish often uses duży / mały with prędkość:

• duża prędkość = high speed
• mała prędkość = low speed

So although duża literally looks like big, the natural English translation here is high.

Also, duża is feminine because it agrees with prędkość, which is a feminine noun.

So:

• prędkość = feminine
• therefore the adjective is duża, not duży

Yes, wysoka prędkość is possible and also means high speed.

But duża prędkość is very natural and common. In many contexts, Polish prefers duży/mały where English might prefer high/low.

So in this sentence, zbyt duża sounds perfectly normal.

Both mean too big / too high, but there is a slight difference in tone:

• zbyt duża = a bit more formal, neutral, or written
• za duża = very common in everyday speech

So:

• prędkość jest zbyt duża = the speed is too high
• prędkość jest za duża = the speed is too high

Both are correct. The version with zbyt sounds slightly more formal or analytical.

Because Polish word order is flexible, and adverbs like często can move around depending on emphasis.

Here:

• prędkość jest często zbyt duża

means the speed is often too high

This placement is natural and neutral.

You could also say:

• Na tej autostradzie często prędkość jest zbyt duża
• Prędkość na tej autostradzie jest często zbyt duża

These are all understandable, though some may sound more natural than others depending on context.

Yes. A few natural alternatives are:

• Prędkość na tej autostradzie jest często zbyt duża.
• Na tej autostradzie często jeździ się za szybko.
• Na tej autostradzie kierowcy często jadą za szybko.

These all express a similar idea, but with slightly different focus:

• prędkość jest zbyt duża focuses on speed
• jeździ się za szybko means people drive too fast
• kierowcy jadą za szybko explicitly mentions drivers

A rough pronunciation guide is:

• prędkość ≈ prend-koshch

A few helpful points:

• ę before d is often pronounced something like en/em in normal speech
• kość has a soft ending; ść sounds somewhat like a soft shch

You do not need a perfect English approximation right away, but it helps to know that the spelling and pronunciation are not fully one-to-one here.