DeKalb Avenue is such a tease. It's hardly a major highway, like I-75 or Highway 316 east to Athens, so who'd imagine you'd get nabbed traveling alongside the MARTA line toward downtown? Because it's a straight shot, the temptation is to push it to 45 or 50. Problem is, the speed limit, at 35 mph, is set for snails. So watch out: Cops are routinely parked at Gringo's restaurant near Moreland Avenue, the car wash at Clifton Road and Inman Animal Hospital on the corner of DeKalb and Waverly Way.