Question This road sign means: Answers Road widens ahead. Lane reduction. The right lane ends soon and traffic should merge left. Highway entrance ramp ahead. Explanation A warning sign is usually yellow with black markings. This sign warns that the number of lanes ahead is reduced and that traffic will need to merge to the left. Take a FREE Practice Test Now This questions appears in the following tests: Alabama Practice Test Delaware Practice Test Idaho Practice Test Nebraska Practice Test Tennessee Practice Test Wisconsin Practice Test California Practice Test South Dakota Practice Test Virginia Practice Test Kansas Practice Test