[23skidoo]

It reads funny, but fewer people drive at night and still make up about half of accidents.

[dzhiurgis]

Yeah but it doesn't say the cause is biker visibility. I'd guess bikers themselves are far more likely to miss some pothole (or other reason) at night time and fataly crash.

[bismuthcrystal]

So why not write something like "accidents happen at a higher rate a night"?

[OJFord]

or "nearly half despite ..."