InterRegio
The InterRegio or Interregio (abbreviated: IR) is a category of trains in multiple European countries. They are existing in Switzerland, Luxembourg, Poland, Denmark, Hungary, Romania and in Portugal and run "from region to region", as described by Swiss Federal Railways (SBB).
InterRegio Media
An EU43 (Bombardier TRAXX) locomotive with a Bydgoszcz-Warsaw InterRegio train
InterRegio stations in Switzerland (through locations of geocoded photos on Wikimedia Commons)
SBB RABe 502 InterRegio train passing by Lake Walen (Walensee)
InterRegio logo SBB CFF FFS