What are 'angles morts' (blind spots) on a heavy commercial truck and where are the largest blind zones located?

1. Large unviewable areas: directly in front of the high cab, directly behind the trailer, along the right side from cab to rear, and below the left window
2. Only the area directly under the front bumper
3. Only the top surface of the trailer roof
4. Heavy trucks have 360-degree panoramic visibility with no blind spots