Both Aberdeen and the London borough of Lambeth are taking part in a Europe-wide initiative called European Mobility Week by announcing "car-free days" in September.
With more than 300 European cities and towns taking part, the European Mobility Week is part of a push towards lower emissions in cities and towns. It is also being used to promote the use of greener forms of public transport.
Running between 16th and 22nd September, the initiative has also attracted both Glasgow and the London borough of Southwark into running activities designed to promote the switch from private to public transport. This is being helped along by improvements to cycle lane networks and discounted cycle hire.
Using the banner "Choose. Change. Combine", European Mobility Week has been running since 2002 and recorded 2,011 participating cities in 2014. So far, Hungary has registered the most amount of cities taking part in the 2015 week, with more than 170 holding events for the week. Of these, 150 will be banning cars for the day, according to businessGreen.
The organisers of European Mobility Week provide resources and handbooks online to guide participating cities on how they can contribute to raising the profile of lower emissions. Just last year, Lambeth closed a main road to host a festival featuring music and a roller disco.