Many of my friends here in Lima are pretty impressed by the fact that I drive here. I feel that my Massachusetts driving skills have not altered since I first received my license at 16 (which statement, I am sure, is scaring the bejeezus out of my parents right now), but many people find themselves overwhelmed by the traffic here.
There are so many problems with the commute here that it's difficult to find a starting point, but I will try - I will make a list:
1) Many cars here in Lima would never pass a car inspection - the biggest problem for other drivers on the road is nonfunctional tail and brake lights;
2) The dotted lines demarcating lanes mean nothing - a three-lane highway can and usually will hold five lanes of traffic;
3) Many Peruvian drivers do not believe that traffic laws or common courtesy applies - blocking the box, taking a righthand turn from the left-most lane, gunning it through stop signs, and driving straight through an intersection from the turning lane, among a number of other obnoxious (and frankly dangerous) driving behaviors, are common;
4) Traffic police - many people complain, for example, about the traffic police in DC, but Peruvian traffic police take the cake; they stop traffic at green lights, allow lanes of traffic to fill up to the point that cars are fully blocking the box and causing a four-way traffic jam, and, from personal experience, have a nasty habit of pulling over perfectly appropriate drivers who take lefthand turns when the lefthand arrow turns green and telling them to drive more carefully.
I'm sure this list doesn't accurately explain just how quickly one's blood pressure rises when driving around Lima, but I assure you that when you come to visit, you will understand very quickly that traffic here is like nothing you've ever experienced before.
Thank goodness my quaint New England driving skills prepared me to be the most aggressive SOB on the road!