Propshaft wrote: ↑Sat Mar 20, 2021 6:48 am
I wonder in the future how many cars will be on the " hard shoulder" due to loss of battery power
I'm not sure about fully electric vehicles as I haven't driven one yet, unless you count moving the Minor on the starter motor

. Who knows how much warning of impending failure you would get with an electric vehicle? Maybe a sudden battery or electrical fault could result in rapid loss of power even if the gauge was showing plenty of 'range' left.
I've certainly had several lead acid batteries fail open circuit without any warning. Started the car fine one minute and then completely dead the next.
Over the years I've seen numerous vehicles stopped on the hard shoulder at night, without any lights, and all were modern. Presumably they had serious electrical faults or maybe the battery had gone flat while waiting for assistance. Either way they were not easy to see on an unlit motorway, but all had obviously made it to the 'relative' safety of the hard shoulder.
Some sections of All Lane Running motorways are unlit, the M1 springs to mind. If a vehicle has total electrical failure in this situation, then without a hard shoulder it will most likely be stranded in a live lane, without lights and with traffic bearing down on it at 60 - 70 mph. At night how long would an approaching driver have to react once said stranded vehicle shows up in their dipped headlamps? Using some ball park figures: Typical dipped headlamp range 50 metres. 70 mph = 31 metres per second. So less than 2 seconds
