What does this sign mean?

When driving in a snowy day, the driver should drive along the vehicle tracks if there are any.

When a vehicle starts up, the driver should observe the traffic conditions and begin to start up after making sure it is safe to do so

When encountering such a situation at an intersection, which of the following is correct? 

How are vehicles allowed to proceed at this intersection? 

What does this sign mean? 

What does this sign mean?

When the head fog light is switched on, the light in the picture is lit. 

The traffic police may confiscate the motorized vehicle driving licence according to law in which situation?

What is the minimum speed for driving in this lane?