Recently I've seen a couple L.E. patrol vehicles roll up on their red, slow, quickly activate light bar, accelerate and then de-activate code lights. I believe we call this Code-2 High. Recently a San Diego Police patrol officer cut off a motorcyclist using that technique. The motorcyclist t-boned the new Ford Explorer patrol car, and motorcyclist died at scene. Lots of times department policy or supervisor will limit how many patrol units can respond Code-3, so others wanting to also cover the call, use the Code-2 High technique.