Battery, Anti-lock and park brake dash warning lights turned on while driving

Thank you Roy, I was just driving along on the freeway and all of a sudden the Battery, Anti-lock, and park brake dash warning lights came on, and stayed on while above 2,000 RPMs, as soon as I came to stoplight, they went out. I accelerated up past 2,000 RPMs and they came back on, an OBD shows no codes. So frustrated, as this car has been outstanding since 2004, and 197,000 miles.