Active Advanced Warning Signs (AAWS) have been shown to effectively alert road users to the presence of a train at a railway level crossing.
In studies of AAWS in different road environments, Polanis found they reduce risk by up to 35% (Polanis, 1999).
Would you have seen the train in the photo below?

Photo source: VicRoads
Specs: TCS-057 (2019)