A warning sign alerts you to possible danger ahead. Take notice of it: that usually means slowing down and being ready to react. At a railway level crossing, slow down and be prepared to stop.
Read more: railway level crossings..
Signs in this group

Look out for trains 
Railway crossing signs 
Keep track clear 
Emergency exit push button 
Look for trains sign 
Railway crossing on side road sign 
Railway level crossing flashing signals ahead
Quick answers
What should you do when approaching a railway level crossing?
Slow down and be prepared to stop.
Based on the Victorian Road to Solo Driving handbook and the VicRoads learner and probationary pages. Rules change from time to time, so check vicroads.vic.gov.au for the latest.
DKT