Question This road sign means: Answers Cars in right lane must slow down. No left turn. Merge. Pass only in the right lane. Explanation This sign indicates a merge ahead. It warns that two lanes of traffic moving in the same direction are about to become one. Take a FREE Practice Test Now This questions appears in the following tests: Maine Practice Test Illinois Practice Test Mississippi Practice Test New Jersey Practice Test Missouri Practice Test Arkansas Practice Test Utah Practice Test Montana Practice Test West Virginia Practice Test North Dakota Practice Test Iowa Practice Test