It’s not unusual to see faded ribbons, wilting flowers or weather-worn teddy bears marking a roadside memorial where drivers in New Jersey lost their lives. But there’s a final resting place along the Garden State Parkway that’s a bit different. Drivers on the way to Cape May might have noticed it out their passenger window: a single headstone on the grassy shoulder of the southbound highway between exits 6 and 4. The headstone, surrounded by American flags, is situated on the grass about 60 feet from the road, about two miles north of exit 4. The plot is the final resting place of African Ame…