mga sir, how would you assess this?

a car is running on the main road...not too fast yet not too slow.
approximately 50ft ahead there was an intersection, on it is a L300 contemplating to cross.
the car sounded its horn several times yet the L300 decided to cross.
the driver of the car stepped on the brakes hardly but the car skid because of the heavy rain.
after half of the L300 body had passed the double yellow line its bumper and of that car collided. it's the car that bumped to the L300.

now, whose fault it was?