Kesesakan lalu lintas bermula pada waktu puncak.

Sesak is an adjective and means crowded, packed, or congested.

Kesesakan is a noun formed with the ke-...-an pattern, which often turns a quality or state into the condition/state of being X.

So:

• sesak = congested, crowded
• kesesakan = congestion

That is why kesesakan lalu lintas means traffic congestion rather than just congested traffic.

Lalu lintas means traffic.

It is a fixed expression in Malay, especially in standard/formal usage. Even though the individual parts historically relate to movement or passing, learners should treat lalu lintas as a set phrase meaning traffic.

So:

• kesesakan lalu lintas = traffic congestion
• lalu lintas = traffic

In Malay, noun combinations often work with the main noun first, followed by a word that modifies or specifies it.

So here:

• kesesakan = congestion
• lalu lintas = traffic

Together, kesesakan lalu lintas literally works like congestion of traffic, which is the normal Malay way to say traffic congestion.

This is a very common Malay pattern.

Bermula means to begin or to start.

Mula can also relate to beginning, but bermula is a common intransitive verb form meaning to begin/start on its own.

Compare:

• bermula = begins / starts
• mula = begin / start, often seen in other structures too

In this sentence, bermula sounds natural and fairly standard:

• Kesesakan lalu lintas bermula... = Traffic congestion begins...

The prefix ber- often forms intransitive verbs in Malay.

In this sentence, bermula describes something starting by itself, not something being actively started by someone.

So:

• bermula = to begin / to start

You do not need to translate ber- separately every time. It is better to learn bermula as a complete verb here.

Here, pada means at.

So:

• pada waktu puncak = at peak hour / during peak hours

In time expressions, pada is often used before a specific time or time period.

Examples:

• pada waktu malam = at night
• pada hari Isnin = on Monday
• pada pukul lima = at five o’clock

Pada is the more standard choice here for a time expression.

• pada is commonly used for times and occasions
• di is more strongly associated with location/place

So for learners, the safest choice is:

• pada waktu puncak = at peak hour

You may hear variations in casual speech, but pada is the standard form to copy.

Waktu puncak means peak hour or rush hour.

• waktu = time
• puncak = peak, highest point

Together, it refers to the busiest part of the day for traffic, such as commuting time.

Depending on context, English may translate it as:

• at peak hour
• during rush hour
• during peak traffic hours

Malay does not always mark singular and plural the way English does.

A phrase like waktu puncak can refer generally to the rush-hour period without needing a plural form.

So even though English often says peak hours, Malay can simply say:

• waktu puncak

This is normal and natural.

Malay does not use articles like the and a/an the way English does.

So:

• Kesesakan lalu lintas can mean traffic congestion, the traffic congestion, or even traffic jams depending on context.

The exact English article is supplied by context, not by a separate Malay word.

Malay verbs do not change form for tense the way English verbs do.

So bermula itself does not specifically mean begins, began, or will begin. The time is usually understood from context or from time words.

Without extra context, this sentence is usually understood as a general present statement, such as:

• Traffic congestion begins at peak hour.
• Traffic congestion starts during rush hour.

If you wanted to make the time clearer, Malay would usually add time markers.

By itself, it sounds most naturally like a general statement or a description of what normally happens.

So it suggests something like:

• Traffic congestion starts during rush hour.

If the speaker wanted to make it clearly about one particular day or one specific event, they would usually add more context.

Yes, that is a reasonable natural translation.

Kesesakan lalu lintas can be translated in English as:

• traffic congestion
• traffic jams

The best English version depends on style and context. If the meaning has already been given to you, the key point is that the Malay phrase refers to heavy, congested traffic conditions.

Yes, it sounds fairly standard and somewhat formal/neutral.

A more everyday spoken way might be something like:

• Jalan mula sesak pada waktu puncak.
• Trafik mula sesak pada waktu puncak.

But Kesesakan lalu lintas bermula pada waktu puncak is perfectly correct and natural in formal writing, reports, announcements, or textbook Malay.

Yes. Trafik is very common in modern Malay, especially in everyday speech.

For example:

• Kesesakan trafik bermula pada waktu puncak.

That said:

• lalu lintas sounds more standard/formal
• trafik sounds more everyday and is also very common

Both are widely understood.

A simple learner-friendly guide is:

• ke-se-SA-kan
• LA-lu LIN-tas
• ber-MU-la
• PA-da
• WAK-tu
• PUN-chak

A few helpful notes:

• c in puncak is pronounced like ch
• e in ke- is usually a weak vowel like uh
• stress in Malay is generally not as strong or contrastive as in English, but these guides can help at first

Yes, it may be understood, but bermula sounds more complete and natural in this sentence.

So the better model to learn is:

• Kesesakan lalu lintas bermula pada waktu puncak.

Using bermula is especially good in standard written Malay.

They are similar, and both can refer to time, but they are not always interchangeable in every expression.

In this sentence, waktu puncak is a set and very natural phrase meaning peak hour/rush hour.

So even though masa also means time, learners should memorize:

• waktu puncak = rush hour / peak hour

That is the most natural wording here.