3) If you answered ‘yes’ to question 2, what design changes do you consider would have this effect? Which design features, if any, should a safety standard mandate or prohibit?
One major factor in serious injuries and deaths can be attributed to the isolation and lack of assistance a rider is able to obtain when an incident does occur. I think fitting all quads/SSVs with automated emergency alarms that initiate in the event of a roll over would be a great initiative. Possibly mandatory for areas with limited to no communication options.
The design feature between locked/unlocked differentials should be further researched as to whether this is impacting on more rollovers occurring, what type of terrain etc. unfortunately there doesn't appear to be enough evidence to suggest that this could be a mandated design feature, however strongly believe it should be looked into.
Lowering the centre of gravity - with anything, the higher the centre of gravity, the more unstable an item of plant becomes. Perhaps a mandatory requirement is to look into only allowing quads/SSVs with a centre of gravity lower than 'x' to be used within Australia.
My brother was killed when the quad he was riding rolled sideways, crushing him under it's weight. The weight of the bike itself was a large contributing factor in that there was no way he would have been able to lift it off him. Quads appear to be getting bigger and heavier which does push for the need for CPDs or ROPS. Although a CPD would not have saved my brother in this instance, it does have the potential to save lives when a bike flips vertically.
One item not addressed in the Issues paper is the tyres that are used on quad bikes. I am not a mechanical expert and don't pretend to be, however the heavier bike in which my brother was killed on had tyres which had blow outs 3 times in a short space of time, with no apparent reason for the blow outs. Determining whether the tyres fitted to quads are actually suitable for their size could be something to consider also.