Restricting families from having multiple cars has its advantages and disadvantages, accidents will reduce, pollution will reduce, traffic will reduce but others will suffer from it.
The electric vehicles you spoke about will solve to some extent. But I know such vehicles would be expensive and not everyone can afford them. Sha, if the government would intervene it will do good.
Yea everything has it downside, but if we focus on those that'll help for a long time, it'll be better, with subside price for electric vehicles or it being introduced in all our public transport, we'll have a safer society.