Slow down.
Save lives.
Slowdown is a simple message: speed doesn't just cause crashes — it makes them worse. Most serious collisions happen close to home, on familiar roads, at routine times.
Every journey matters. Every speed choice matters — especially close to home.
A familiar street. A simple choice.
Pledges made
People choosing to slow down — one street at a time.
What people are pledging
The facts about speed
UK road safety data shows why 20mph makes a difference.
97% survival rate
A pedestrian hit at 20mph has a 97% chance of survival; at 30mph this drops to 80%. (ROSPA)
42% fewer casualties
London's 20mph zones showed a 42% reduction in road casualties within the first year. (TfL, 2021)
Nearly double the distance
At 20mph, stopping distance is 12 metres; at 30mph it's 23 metres — nearly twice as far. (Highway Code)
24% of fatal collisions
Excessive or inappropriate speed contributed to 24% of all fatal road collisions in Great Britain in 2022. (DfT)
Just 2 minutes difference
Driving at 30mph instead of 20mph on a typical 2-mile urban journey saves approximately 2 minutes but triples the risk. (Brake)
20% are children
Children aged 0-15 account for approximately 20% of pedestrian casualties in residential areas. (DfT, 2022)
This is why it matters
Less time to react
More speed means fewer seconds to notice a child, a cyclist, or a sudden stop.
Longer stopping distance
That extra bit of speed takes more road to stop — especially in rain, dark, or distraction.
More severe injuries
Impact force rises fast. Small speed changes can mean life-changing outcomes.
Where slowing down saves lives
Not every road needs speed. Some roads need care.
Near schools
Kids are unpredictable. Give yourself time.
Residential streets
Doors open. People cross. Dogs bolt.
Crossings & junctions
Slow early, scan wider.
Rain / night
Visibility drops. Stopping distance grows.
Real stories from drivers
Read how slowing down to 20mph made a real difference in everyday situations.
Want to help spread the message? Support the project.