TRANSPORT

Self-driving and autonomous running vehicle platoons pose many risks. They include a ‘malicious takeover’ by cyber-attack putting the safety of road users at risk.

SELF-DRIVING lorries which are to be trialled on England’s motorways could be vulnerable to cyber-attack, an official report has warned.

A feasibility study of the Government’s plans said there was a risk of a ‘malicious takeover’ of the convoys, putting road users at risk.

Under the scheme, up to three wirelessly connected HGVs will move in a platoon, with acceleration and braking controlled by the lead vehicle. The lorries would still be steered by drivers.

The report, commissioned by the Department for Transport (DfT), concludes that the system has the potential to reduce accidents and emissions, while improving traffic flow. But it also outlines 20 risks, including cyber-attack and the potential for drivers in the middle and back vehicles to lose concentration.

Extreme weather conditions could lead to the sensing system keeping the vehicles a set distance apart malfunctioning. Other cars could enter the convoy by mistake, and the lead lorry could suffer a tyre blow-out.

The scheme is expected to be tried on major roads next year.

Driving in a convoy could see the front lorry push air out of the way, making the vehicles more efficient and lowering emissions. But Edmund King, AA president, said the safety of drivers must come first.

He said: ‘There have been causes of connected and autonomous vehicles and even road signs being hacked. The safety of the drivers is paramount.

‘If the platoon is hacked it could put on the brakes or try to make it accelerate.’

The study into “heavy vehicle platoons on UK roads” was carried out by the independent Transport Research Laboratory consultancy and others in 2014 but has only just been published.

One lorry drivers’ organisation, which was not named, told the authors it was worried about ‘the safety impact of running so close together,’ adding: ‘There is no fuel-saving amount that is worth risking road safety for.’

The report said the probability of a ‘malicious takeover of platoon (cyber-attack)’ was ‘very low’, but its impact would be ‘very high’ and would involve a ‘threat to road user safety, road infrastructure and reputation’ of the convoy system.

It said, ‘adverse environmental conditions’ such as fog and snow could ‘affect sensing capability’. The report also said other motorists could be unaware of the convoy and drive between the lorries. And the authors said ‘driver underload’ was a problem as they may lose concentration when they are not performing the full range of driving tasks. They suggest training drivers for ‘behavioural adaptation awareness’.

The document said: ‘It must be ensured that they will always be able to re-engage in the driving task within a few seconds.’

The report said it believed convoys would be safer overall, adding: ‘Around 90 per cent of accidents involve driver error. Automatic control (or driver assistance) reduces the magnitude of the risk of driver error.’ The DfT has not responded to a request for comment.