Paris instigated emergency measures to help dispel a smog that caused it to be briefly recorded as the most polluted city in the world.
For one day in March, in an effort to temporarily cut traffic, electric and hybrid vehicles and those carrying more than three people were allowed in the capital while other vehicles were restricted to those with odd-numbered registrations.
Police handed out fines to motorists ignoring the measures, while public transport, the bicycle share scheme and residential parking were made free to help people find alternative means of getting about.
It is the third time since 1997 that Paris authorities have used such measures, most recently with a successful two-day ban last year.
The pollution spike was said to have been caused when carbon monoxide and dangerous light PM10 particles, which remain airborne for longer, were unable to disperse due to weather conditions.