Eastbound >< Westbound

Have you ever experienced this:

You drive thru motorway/freeway, let say you're traveling in eastbound lane, and suddenly got stuck with traffic, wonder whats happening with traffic ahead?

There's no roadwork sign whatsoever, no traffic light *d'oh! of cos no traffic lights in motorway!!*..
And what else you can ever think of?
Accident?

Could be. Yes, accident.

Then have you ever think of : where exactly the accident happens?

Even though you're driving thru the eastbound lane, and the accident happens in the westbound lane, the traffic jam not only occurs in westbound lane.
But also on YOUR lane: the eastbound lane.

But why?
Let's analyze it closer: accident on the westbound, but the traffic jam on the eastbound as well?
Is there any accident in eastbound too??

The answer is no. No accident whatsoever happens in eastbound lanes.

Bottom line: no matter where/which lanes accident happens, traffic jam occurs in both lanes.

Let say, it happens to me when I drive thru M4.

This makes me thinking why people on the eastbound lane get affected by what's happening on (another completely) different direction of traffic?
This two ways traffic are divided by huge big vegies median in the middle, and there is no way, no way on earth eastbound lane should be affected by the westbound accident.

Why do you think eastbound people get being in traffic jam; just becos of westbound people in traffic jam too?

Dont you think people are amazing.. how sympathetic they are?

errrr....
I don't think so..

I found it very funny and it makes me laugh out loud to myself, finding out people on eastbound's slowing their car down; just in curiosity looking other lane's accident.
They don't stop their car, they don't pull over, they don't get off and help the accidentees anyways...

And then...??