DUI checkpoints staged on Orange County roadways are similar, regardless of the law enforcement agency running them. Well-lit signs alert drivers of the approaching checkpoint as vehicles are generally funneled into two lanes by narrowing rows of orange cones. Officers then will stop vehicles based on a pre-determined formula: every vehicle, every other vehicle, every third vehicle, etc. The checkpoint set up by Garden Grove PD along Harbor Boulevard on Dec. 22 added an element that would show drivers the real cost of intoxicated driving … the human cost. Poster-sized photos of fallen Costa Mesa Fire Capt. Mike Kreza, posing…