The 10 "key" actions. Reduce speed limits on highways by at least 10 km/h Impact*: Saves around 290 kb/d of oil use from cars, and an additional 140 kb/d from trucks Work from home up to three days a week where possible Impact: One day a week saves around 170 kb/d; three days saves around 500 kb/d Car-free Sundays in cities Impact: Every Sunday saves around 380 kb/d; one Sunday a month saves 95 kb/d Make the use of public transport cheaper and incentivise micromobility, walking and cycling Impact: Saves around 330 kb/d Alternate private car access to roads in large cities Impact: Saves around 210 kb/d Increase car sharing and adopt practices to reduce fuel use Impact: Saves around 470 kb/d Promote efficient driving for freight trucks and delivery of goods Impact: Saves around 320 kb/d Using high-speed and night trains instead of planes where possible Impact: Saves around 40 kb/d Avoid business air travel where alternative options exist Impact: Saves around 260 kb/d Reinforce the adoption of electric and more efficient vehicles Impact: Saves around 100 kb/d