UK Driving Theory Practice Exam

Blue flashing lights on a vehicle typically indicate that it is an emergency service vehicle. This usually includes fire trucks, ambulances, and other emergency response vehicles. Police cars typically also use blue flashing lights, but they may also use red or red and blue lights in certain situations. Highway maintenance vehicles typically use yellow flashing lights, and post office vehicles do not typically have flashing lights at all. Therefore, although A and C may seem like plausible options, B is the most accurate answer for this question. Additionally, blue flashing lights may also signify a vehicle involved in a funeral procession or a pilot car for an oversized load, but these are less common and not included as options.