1. 看到一個一個有趣自行車事故的統計：

Risk by distance and age (NL)

數據來源：

https://www.cyclehelmets.org/1026.html

2. 還有一個網站，說男性自行車死亡率是女性的6倍：

First, know some bicycle safety facts:

1. Regardless of the season, bicyclist deaths occurred most often between 6 p.m. and 9 p.m.
2. Bicyclist deaths occur most often in urban areas (78%) compared to rural areas (22%) in 2019.
3. Bicyclist deaths were 6 times higher for males than females in 2019.
4. One in four fatal bike crashes in 2019 involved a bicyclist who had been drinking alcohol.

數據來源（在 Avoid Crashes 部分）：

https://www.nhtsa.gov/road-safety/bicycle-safety

所以說，50歲以後，就不要再騎自行車了。因為受傷的風險高過駕車的風險。

注：8/10/2021 本人騎車摔倒，多虧頭盔，否則後果不堪設想！遂寫此文。