What's Taking So Long?

Yesterday on the way home from work, we got stuck in a traffic jam on the freeway..There were cars crawling like turtles bumper to bumper all the way to yonder and beyond..
..and more cars stuck behind mine too. What's going on? It's never been this bad, what's taking so long to move? By then it had started to rain..
As we inched slowly forward we saw the notice board telling us there was a collision up ahead and 2 lanes on the right had been closed so all traffic were to merge into the left lane and the emergency lane.
A few yards up ahead we were beginning to see the accident scene starting with these emergency workers blocking the road and signaling people to merge left.
Then we saw the emergency respond vehicle with it's merge left signal flashing but still can't see the accident yet.
Didn't take long before we come up to the scene of the collision between a taxi and I believe a semi-trailer! There was a stretcher with someone lying on it whom I believe would be the taxi driver, poor bugger I hope he's ok but I can't see his face and I fear the worst...
On closer look at the taxi it looked like the front has been smashed in together with the windscreen and liquid had spilled onto the road and someone had put some absorbant on it to soak it up.
Moving up ahead I saw the semi-trailer behind the ambulance and the toll truck, doesn't look like there's any damage to the semi-trailer.

Once we were clear of the scene the road is all clear again. That was the excitement of the day for me. Move along people, nothing to see here.