My husband and I zipped along I-95 South, near Washington DC, on a section of interstate that never sleeps. Among the mostly courteous drivers, a few wanna-be race car drivers cut in and out too close for comfort. I marveled at how a tight space could hold so many speeding vehicles. That changed when we reached an area marked, “Warning: Unmarked Pavement Ahead.” Without the markings to define our lanes, the space that had comfortably held four lanes of speeding traffic abruptly shrank to Continue Reading