Breakdown of Hij is wakker, want de straat is erg druk.
zijn
to be
hij
he / it (referring to a 'de'-word)
erg
very / really
want
because
Questions & Answers about Hij is wakker, want de straat is erg druk.
Why is the word order normal after want?
Want (because) is a coordinating conjunction. This means it simply glues two regular, independent sentences together. The second part, de straat is erg druk, keeps the normal order of Subject + Verb. You will later learn another word for "because" that does push the verb to the end of the sentence, but want keeps things simple!
Do I always need a comma before want?
Yes, in written Dutch, you always place a comma before want when it connects two full sentences like it does here.
Are erg and heel interchangeable for "very"?
Yes! Here the sentence uses erg druk (very busy), but you could also say heel druk. They mean the exact same thing and are both extremely common.
Does druk mean "busy" like a busy person, or "crowded"?
It means both! In Dutch, a street, store, or city can be druk (crowded, having lots of traffic), and a person can also be druk (having a lot of work to do, or acting loud and hyperactive).