The heavy volume of traffic on roads and on public transport that occurs in the morning and late afternoon when many people are going to work or coming home from there.
example
Ich versuche, den Berufsverkehr zu meiden, und fahre deshalb immer erst nach 9 Uhr ins Büro.
I try to avoid rush-hour traffic, so I always go to the office only after 9 o'clock.
Usage tips
Word composition
This word consists of 'Beruf' (occupation/profession) and 'Verkehr' (traffic). So it describes the traffic that arises because people are traveling to their jobs or coming home from there.
EXAMPLE
Der morgendliche Berufsverkehr ist oft besonders schlimm.
Morning rush-hour traffic is often especially bad.
Typical collocations
Very typical expressions are 'im Berufsverkehr stecken' (to be stuck in rush-hour traffic) or 'den Berufsverkehr meiden' (to avoid rush-hour traffic). The time is often described more precisely with 'morgendlicher' (morning) or 'abendlicher' (evening) Berufsverkehr.
EXAMPLE
Gestern habe ich eine Stunde im Berufsverkehr festgesteckt.
Yesterday I was stuck in rush-hour traffic for an hour.
Correct preposition
When you are in rush-hour traffic, German uses the preposition 'in' with the dative. So the correct form is almost always 'im Berufsverkehr' (in rush-hour traffic).
EXAMPLE
Im Berufsverkehr braucht man für diese Strecke doppelt so lange.
In rush-hour traffic, this route takes twice as long.