Spardo:
Vince,
That is an amazing effort on your part. Most of these I can understand, for historical reasons, but why on earth countries like:
Dominica - ex Spanish?
Indonesia - ex Dutch
Macau - ex Portuguese
Mozambique - ex Portuguese
Thailand - ex nothing
US Virgins - ex ecrable
and Hong Kong - doesn’t it have direct road links with China? If so there is another crossover point.
Must bear all these in mind for my next long distance trip!
I did some research last night, and found the following:
Holland, Spain and Portugal all used to drive left. This chaged sometime before WW1. Don’t forget, Holland used to be a Spanish holding.
Russia changed just before the war.
At the time of the anschluss, Czechoslovakia, Hungary, and half of Austria drove left. Try figuring out how they managed in Austria with part of the country driving left, and part driving right…Anyways, Hitler passed an edict that all occupied countries would drive right, and they have done so ever since.
Sweden changed in 1967. At this time, they retired all of the old left-running trams in Stockholm, but it took several months to replace all the busses with right-doored models. It seems that most crossings between Sweden and Norway were unguarded and rural, and many drivers would forget which side to drive on. BTW, most Swedish home-market vehicles were left-side controls even then, since they used to favour having curbside entry.
In North America, the US colonies all used right-running from the earliest days, but the Canadian provinces of Ontario, Quebec and British Columbia drove left into this century, ON and PQ converted before WW1, but BC waited until the late 20’s to convert. Newfoundland only joined Canada in 1949, and switched to right-running at that time.
Brazil, having been a Portuguese colony, drove left until early in the 20th century.
The US Virgin Islands have kept left-running, a holdover from old Spanish control. From what I remember, most people there drive typical left-control American cars, and a right-corner mirror is popular with cabs and other cars that work in heavy traffic, in order to see ahead.
Thailand tried to emulate the British, so that may be why they drive left. China has passed right since confucian times, when an edict was passed, so perhaps the Siamese were just trying to be different?
I’m sure any crossings between these left-running asian countries is heavily guarded today, so switching ont-the-fly likely doesn’t happen. Likewise, in North America, there are land borders between Dominica and Haiti, as well as with Suriname and whatever it borders with, but I’m certain all those borders are guarded as well. African customs crossings are probably also a stop-and-wait proposition.