Comment by dijksterhuis

extrapolating a little, 15mph is ~<10m

Speed | Thinking + braking distance | Stopping distance

20mph | 6m + 6m | 12m (40 feet)

30mph | 9m + 14m | 23m (75 feet)

40mph | 12m + 24m | 36m (118 feet)

50mph | 15m + 38m | 53m (174 feet)

60mph | 18m + 55m | 73m (240 feet)

70mph | 21m + 75m | 96m (315 feet)

> https://www.theaa.com/breakdown-cover/advice/stopping-distan...

note that the braking distances are not for modern cars with advancements in braking tech etc.