[toast0]

It's asking for a lot of detailed attention in a lot of different places.

With right hand driving, I need to look left to consider if that traffic will be exiting or continuing. I need to look right to consider if that traffic has slowed and I need to slow. I also need to look hard left and hard right for pedestrians, who likely want to cross near the intersection (where it's most convenient) regardless of where traffic engineers are encouraging them to cross. Oh, and I better keep an eye on my mirrors, because I may need to take evasive action if the guy behind me isn't looking and I need to stop for traffic.

It's pretty hard to look at five different places at once.