Question This sign means: Answers T intersection. Lane shifting. Side road. Do not block intersection. Explanation Warning signs prepare drivers for upcoming road conditions and hazards and are usually yellow with black markings. This sign warns drivers that they are approaching a T intersection and should prepare to turn either right or left. Take a FREE Practice Test Now This questions appears in the following tests: Illinois Practice Test Washington Practice Test New Jersey Practice Test Maine Practice Test North Carolina Practice Test Oregon Practice Test West Virginia Practice Test Hawaii Practice Test Rhode Island Practice Test