More than a third of children in the UK know someone who has been hit by a car, according to road safety charity Brake.
They are behind a survey of more than 16,000 kids which has been given to the government, asking for cars to be made to drive more slowly in certain places.
Every day in the UK seven children are killed or seriously injured in road accidents while walking or cycling.
The survey is part of National Road Safety Week, and was handed to the politician in charge of road safety.
Road Safety Week has been organised by Brake, and they want the government to bring in a law that means cars aren't allowed to go faster than 20 miles per hour in places where there are lots of buildings.
If a driver hits someone on foot at 20mph, they will almost definitely live
If they are hit at 30mph, they have a one in five chance of dying
At 40mph, they will almost definitely die
That would include areas where there are likely to be lots of children around, such as places close to schools and houses.
In Scotland a rule is being brought in to stop cars going faster than 20mph near schools at certain times, and some towns and cities in the UK are doing something similar.
But it's not a law everywhere, which means that some speed limits are different depending which part of the country people live in.
A survey from Brake says around three quarters of children are worried about traffic where they live and four out five teachers felt pupils were at risk on roads near schools.