Terry Sznober thought he was doing the right thing. He was in heavy traffic on Saint John’s Harbour Bridge and saw signs saying that traffic would be reduced to one lane in about two kilometres.

So he did what he always does in such situations: he employed the “zipper merge.” 

The zipper merge, for those who aren’t familiar with it, has drivers stay in their lane and delay merging until the moment their lane comes to an end. Then, when they reach the bottleneck, drivers from each lane take turns entering the reduced lane, merging like the teeth of a zipper.

But