Cement truck

This qualifies as ludicrous. I've been feeling a little off so I'm having a hard time finding the funny.

This morning, I was in the left lane on Carling Avenue. A cement truck came down the off ramp from the Queensway and needed to turn left at the next intersection. He had to get across three lanes of traffic during rush hour. Clever fellow that he was, not only was he using his signal lights but he had his window down and was waving and gesturing so that we could see that he needed to change not just one lane but three. I allowed a big gap to form in front of me so that he could make his lane change. He gave me a grateful wave and made his move.

A car came from behind me, zipped around me and into the lane in front of me. The cement truck was already part way into the lane and still signalling. The car tried to scoot up the lane between the truck and the curb.

I was aghast. It's not like the truck wasn't obvious with its huge bulk and its flashing lights and its placement in the lane. How could a driver miss something like this? I was amazed at how long it took for the driver to realize his error and slam on the brakes, allowing the truck to just clear his front end.

How is it that natural selection has allowed this driver to survive as long as this?