A yellow diamond sign showing a side traffic line joining your lane means:

Correct answer: C – Traffic will merge into your roadway ahead
The merge sign warns that traffic from another roadway will enter the traffic stream ahead. Watch for vehicles entering from the side and remain attentive to available space around your vehicle. An added-lane sign uses a different symbol because that traffic receives its own continuing lane.
Source: Delaware Driver Manual — § 4, “Other Warning Signs”, 2 DE Admin. Code 2402 – Manual on Uniform Traffic Control Devices (MUTCD), Part 2, W4-1, “Merge”



