Le transporteur livre le colis au point relais.

No. Le transporteur means the carrier, the delivery company, or the courier—the person or company responsible for transporting and delivering the package.

Le transport means transportation as a general concept, not the company or person doing it.

So in this sentence, le transporteur is the one delivering the parcel.

Because livre is the verb livrer conjugated in the present tense for il/elle/on or for a singular noun like le transporteur.

• livrer = to deliver
• le transporteur livre = the carrier delivers / is delivering

This is the normal present-tense pattern for many -er verbs:

• je livre
• tu livres
• il/elle/on livre
• nous livrons
• vous livrez
• ils/elles livrent

French usually requires an article where English often does too.

• Le transporteur = the carrier
• le colis = the parcel/package

Here, both are definite:

• the carrier = a specific carrier
• the package = a specific package

If it were indefinite, you might see:

• Un transporteur livre un colis = a carrier delivers a package

Au is the contraction of à + le.

So:

• à le point relais becomes au point relais

This contraction is required in standard French.

Similar contractions:

• à + le = au
• à + les = aux
• de + le = du
• de + les = des

So au point relais literally means to the pickup point.

A point relais is a parcel pickup location, often a shop or business where delivered packages are held for collection.

It is not usually your home address. Instead, the package is delivered to a designated collection point, and the customer picks it up there later.

In English, this may be translated as:

• pickup point
• parcel shop
• collection point
• drop-off/pickup location
  depending on context

Because point relais here uses the article le: le point relais.

When à comes before le, it contracts to au:

• au point relais = à le point relais

You would not normally say à point relais in this sentence, because that would be missing the article.

Here, colis is singular, because it follows le:

• le colis = the package
• les colis = the packages

The word colis is spelled the same in both singular and plural, so the article tells you which one it is.

This is the standard French sentence order:

subject + verb + direct object + prepositional phrase

So:

• Le transporteur = subject
• livre = verb
• le colis = direct object
• au point relais = where/to where it is delivered

This is very similar to English:

• The carrier delivers the package to the pickup point.

French present tense can often cover both ideas:

• delivers
• is delivering

So Le transporteur livre le colis au point relais could mean:

• the carrier delivers the package to the pickup point
• the carrier is delivering the package to the pickup point

The exact English translation depends on context.

A simple pronunciation guide is:

luh trahn-spor-tuhr leevr luh koh-lee oh pwan ruh-lay

A few useful notes:

• transporteur ends with a sound like -teur = -tuhr
• livre sounds like leevr
• colis sounds like koh-lee
• au sounds like oh
• point is nasal: pwan
• relais sounds like ruh-lay

In natural speech, le transporteur may flow together smoothly.

Sometimes, yes, but they are not always exactly the same.

• le livreur = the delivery person
• le transporteur = the carrier / shipping company / transporter

Le livreur focuses more on the person doing the delivery. Le transporteur can refer more broadly to the company or service responsible for transport.

So whether you can replace it depends on the context.

Yes. The French present tense often expresses:

• a current action
• a habitual action
• a general fact
• scheduled or standard procedure

So this sentence could mean:

• the carrier is delivering the package to the pickup point right now
• the carrier delivers packages to pickup points as a normal process
• according to the tracking/status, the package goes to the pickup point

Context tells you which meaning is intended.