Advanced driver assistance features have been around for well over two decades (if you count the earliest cruise control) and there’s no doubt that the roads are safer for them. But as the list of features, sensors and software grows and complexity increases, making sure there are no glitches that cause more problems than they solve is crucial. Systems that intervene with driving (braking or steering), like autonomous emergency braking and active lane keeping, are among the most safety critical and there can’t be any circumstances where they lose the plot and do something they shouldn’t. But unfortunately, they sometimes do. BBC News recently reported that cars in Somerset had left the road after advanced driver assistance systems (ADAS) apparently mistook a cattle grid for a wall and slammed on the brakes.