Once bitten, twice shy

On Wednesdays, I can get the freshest fruits and vegetables. There's a farmer's market that gets set up every week outside my office; they close the street for a block in each direction, and the vendors sell everything from honey to oranges to avocados. We tend to go out for lunch quite often around here, and I had noticed a curious behaviour of my co-workers. While I tended to walk along the middle of the farmer's market, looking at what fresh fruit I could buy and consequently leave to rot in my fridge, they usually moved over to the sidewalk after half a block. Yesterday I asked why they did that, and they explained:
A little over two years ago, following a minor traffic accident at 4th Street and Arizona, an 86-year old man slammed on the accelerator instead of the brakein his Buick. The car careened south down Arizona Street directly through the middle of the farmer's market, where it struck 50, and eventually killing 10 people. The car came to a stop not 10 steps in front of the main entrance to my building. Many people, my colleague said, actually saw the entire event take place through the windows; virtually everyone who had a southwest facing office saw the entire scene unfold. In fact some people in the building rushed out and helped lift the car off one of the victims, still breathing and trapped underneath the car.
After that stunning revelation, I understood why barricades are now set up on each end of the market; there is at least one police cruiser at each street corner, and the farmers themselves park their trucks as to block traffic at each location. Still, it's nice that they had continued to set up the market every Wednesday morning, where casual shoppers can stop off to buy delicious organic zucchini.
I guess it's an old issue now that this event has passed from recent memory, but should the elderly be required to re-certify? Personally, I am all for requiring recertification. Combined with strict graduated driving, (once my utter, unspeakable nemesis) it helps ensure that only the best be granted the priviledge of driving during the most dangerous years of their lives .