Government:

Ban private cars from city centres.
Improve roads so that traffic moves faster.
Limit parking places in towns.
Make drivers pay more to use roads.
Make roads in cities narrower to discourage drivers.
Set up a system of 'shared' taxis.
Spend more money on improving public transport.

К сожалению, у нас пока нет статистики ответов на данный вопрос, но мы работаем над этим.