It's our job to work out why he never got there.

弄清楚他為什麼沒能安全到家正是我們的工作。

The rider broke his neck on impact here.

這位騎士在撞擊時弄斷了脖子。

Having crashed into this car that was turning right.

因為他撞上了要右轉的車輛。

By analyzing the impact, we know he hit the car at 30 km/h.

我們分析了一下，他在衝撞時的速率是每小時 30 公里。

And these marks on the road tell us that he skidded for 21 meters, having braked hard here.

從路面的痕跡可以看出他在這裡緊急煞車後，滑行了 21 公尺。

When he first reacted, he was doing 68.

當他意識到前方車輛時，車速是每小時 68 公里。

But let's change one small thing.

現在來做一點小小的改變。

At 60, the driver would have had more chance to see him properly.

若當時車速是每小時 60 公里，駕駛將有更多機會在適當距離注意到來車。

He'd have stayed in control and reached this point a moment later.

他就能控制得住，並能安全渡過。

The car would have cleared his path and he'd be home by now.

車子將不會撞到他，而他現在也能安然無恙的回家。

You decide on your speed.

你可以決定你的車速。

The physics decides whether you live or die.

但物理定律將決定你的生死。

(Slowing down won't kill you.)

「減速會救你一命」