Complex sentence: Corridor Manager had also organized a two-day training session with Traffic Police and one-day training session with The Institute of Driving Training & Research (IDTR) was designed to familiarize marshals with their assignment at the time of deployment.
Split into simpler sentences: Corridor Manager had also organized a two-day training session with Traffic Police and one-day training session with The Institute of Driving Training & Research (IDTR). This was designed to familiarize marshals with their assignment at the time of deployment.