No stats that I'm aware of. My observation is that people generally imagine disaster scenarios that do not come to pass when it comes to large traffic changes.

No stats that I'm aware of. My observation is that people generally imagine disaster scenarios that do not come to pass when it comes to large traffic changes. Two short anecdotes to support the observation. 1) My wife and I visited Ireland for a vacation a few years back. Neither she nor I had driven on the left side previously. We drove around the southwest of Ireland for a week and a half w/o incident. Driving on the left side wasn't really a big issue. Pulling away from the curb was the biggest challenge, but it became "natural" after a day or so. It was much more difficult navigating very narrow roads with (it seemed) mere inches from a stone wall on the left and oncoming traffic on the right. Our situation was helped quite a bit by our familiarity with driving standard and familiarity with circulars (rotaries). Either of those factors would have made the situation much more difficult if we weren't. 2) Two years ago, several key roads in downtown Providence, RI (a state in the US) were switched from one to two-way. Everyone predicted a large increase in accidents. I'm unaware of any increase in accidents to date. Our largest traffic problems continue to be caused by road construction sites with poor signs, RI's overall inability to communicate effectively with signs, and college students from non-urban areas who walk into the street w/o looking and under the assumption that cars will just stop. Despite my skepticism of a switch to right side driving being a big issue, I fear that we won't see it any sooner than we will see the US finally switch to the metric system.