This is really unfortunate incident and I see everyday bike accidents on Islamabad Highway. Although I am a very big fan of defensive driving but bikers should also be more careful on highways where survival chance is very low in case of an accident.
I personally witnessed the same accident on GT road once when I was behind a bike. They were very fortunate as I like to keep a fair distance from the vehicle ahead.
@fazalwahab11375, thanks for bringing up the educational/informative posts. Keep up the good work.
Cheers
Bilal