Looking at the sign, what happens to the traffic flow?
A)All lanes continue straight without splitting.
B)The outer lanes close and only the central lane is maintained.
C)The central lane splits, creating four lanes: two to the left and two to the right.Correct
Sign S-63b indicates a fork on a three-lane one-way road: the central lane splits, creating a total of four lanes at the fork. Of these four lanes, two diverge to the left and two to the right. This sign allows drivers to position themselves in the correct lane in advance according to the direction they intend to take.