well

When the truck driver starts the turn, there is nothing
in his path. He only need to make sure there is enough
room for cars to stop in time. The trouble here is that
·´¯`·._. drove into the truck driver's
blind spot. If the truck driver has to wait for the
road to be clear of cars to make turn, he may have to
wait forever on some road. There may even be a traffic
code indicating the other drivers need to wait for
the truck to complete the turn.

I see truck turns after the light changes to red all the time. All the other drivers at the intersection would wait for the truck to complete the turn.