I used to have a perfect view of these fly-overs from my classroom when I was in high school. During exam time, we were seated in alphabetical order according to our surnames - this put me right over at the window, which suited me perfectly. I've never been able to sit and do nothing for very long (my record is about 3 minutes, and I was all worn out from the exertion afterwards), so whenever I finished an exam early - which was fairly often - I'd have to invent elaborate mental games to keep myself from going crazy with boredom.
These fly-overs over the N1 were a godsend, as you can imagine, because they meant I could keep busy by counting cars. I would keep a tally of how many cars of a certain colour went past in each direction, how many trucks went past, how many motorbikes, and so on. Yes children, when we were young, back in the olden days, we didn't have fancy computer games or iPhone apps - we had to make our own fun.
Talking about fun, the latest episode of The Digital Edge podcast is available - download it here. (The Digital Edge is South Africa's best podcast, and I'm totally biased, because I'm in it.)