As petrol prices climb and concerns grow about global fuel supply, some New Zealanders are recalling a time when the government took a dramatic step to reduce petrol use – introducing what became known as “carless days.”
The policy was introduced on 30 July 1979 during the global oil crisis, when disruptions linked to the Iranian Revolution caused severe shortages and sharp increases in oil prices worldwide. At the time, New Zealand relied heavily on imported oil, and the country suddenly found itself receiving around 10-15 percent less oil than normal.
Faced with the possibility of running short of petrol, the government of the day introduced emergency measures aimed at reducing fuel consumption across the country.
Under the scheme, owners of most petrol-powered private vehicles were required to choose one day of the week when they would not drive their car at all.
Motorists displayed a coloured sticker on their windscreen indicating their nominated “carless day.” Driving the vehicle on that day was illegal and could lead to a fine.
The policy applied to most private vehicles, although some exemptions were granted. Essential services, certain rural users, taxis and others whose work required regular travel could apply for special exemption stickers.
Carless days were part of a broader set of measures introduced by the government to conserve petrol. Other steps included banning petrol sales on weekends and encouraging people to reduce fuel use by about 10 percent.
The open-road speed limit had also previously been reduced from 100 km/h to 80 km/h during the earlier oil crisis in the 1970s as another way to reduce fuel consumption.
While the policy forced many people to rethink how they travelled, it also revealed several weaknesses.
Households that owned more than one vehicle could simply choose different carless days for each car and continue driving throughout the week. A black market also developed for exemption stickers, and some motorists simply ignored the rules.
At the same time, the scheme did encourage some behavioural changes. More people began car-pooling, taking buses, riding motorcycles or bicycles, or postponing non-essential trips.
Despite the strict rules, the policy produced only a modest reduction in petrol use.
Government estimates suggested carless days reduced fuel consumption by about three percent overall, although some households reduced their fuel use by more.
Because of its limited effectiveness and the practical challenges of enforcing it, the scheme was suspended in May 1980 – less than a year after it was introduced.
Although the policy lasted only a short time, “carless days” remain one of the most memorable responses to the oil shocks of the 1970s.
The experience also highlighted how vulnerable New Zealand can be to disruptions in global fuel supply – a reality that still shapes debates today as petrol prices rise and governments consider how to manage energy security and the cost of living.
