Just to add another data point, in the UK it is perfectly legal to ride a horse (or horse drawn vehicle) on all roads except motorways. I expect similar laws ex

Just to add another data point, in the UK it is perfectly legal to ride a horse (or horse drawn vehicle) on all roads except motorways. I expect similar laws exist in the rest of Europe. Due to the density of other roads it is possible to get about quite easily but I suppose this isn't the case for the USA which is larger and less dense.