What does this sign mean?

a. when driving slow overtake to the right
b. drive only in the right-hand lane
c. keep in the right-hand lane when driving slow

The right-hand lane is for those who drive slowly.

Explanation:

a. It means that on the right-hand lane the traffic is slow. so if you want to travel at slower speed so you should use right-hand lane of the road.

b. Because right-hand lane is for those driver who want to travel at a slower speed.

c. Because on the other hand lane the traffic is fast, and if you drive slowly on the left-hand side so it may cause traffic accident. So that's why keep in the right-hand lane when you want driving slow.

its a hope it good luck

answer; u.s senate;