Are semi-autonomous systems making cars safer?

The industry picture we’re looking at now, as Avery explains it, is one in which almost every major car manufacturer is fitting what we call ‘SAE level two’ driver assistance systems to their cars: lane keeping systems that will work to prevent you from changing lanes into the path of another car, for example, or adaptive cruise control systems that not only recognise the current speed limit but can also automatically adopt it. 

“But they’re all very different,” says Avery, “so there’s a real need to assess the effectiveness of them in a strictly objective sense [for which Thatcham has come up with meticulously repeatable tests done by robots] but also how sensitively they’re tuned, how well they’re integrated into the driving experience and how usable they are.” 

We’re about to get a firsthand idea. Having earlier run through an S-bend marked on Thatcham’s proving ground runway as if on a particularly windy dual carriageway to show how it tests lane keeping systems, we’re now motoring towards our plucky fake Fiesta at 50mph in a Volvo V60 as if we’re about to undertake it on the motorway. The Ford pulls into our lane at the last minute, as part of what Thatcham calls a ‘cut-in’ test – something most of the models in its first fleet of test cars apparently struggle to negotiate satisfactorily. Sure enough, the V60’s AEB system fails to detect the threat and the Volvo thumps through the target’s deformable plastic panels and rips them clean off. 

“The best cars we’ve tested have balanced driver support systems,” says Avery. “They don’t feel like they’re driving themselves, keeping the driver fully engaged; they don’t break in and out abruptly or ‘throw control over the fence’, as we refer to it – but they do provide a dependable, robust amount of assistance. Not too much and not too little.” 

Our man is very clear, too, on the need for that kind of system tuning in the most relevant technological context in which the car industry now finds itself: the sweep towards fully autonomous driving. 

“Our research suggests that there is already a sense among today’s drivers that their cars are ready to drive themselves – but, right now, they’re anything but,” he says. “If assisted driving technologies encourage drivers to disengage at the wheel – and one or two of them already are – we could see road safety statistics suddenly get a lot worse when you would reasonably expect them to be doing the opposite.