In Britopia there were the Leftists who believed motorists should drive on the left and the Rightists who believed they should drive on the Right. The vote split exactly down the middle and it was finally decided that there would be no rule at all.
In the end it was further decided that there would be no traffic rules of any kind: no right of way at junctions, no speed limits, no parking restrictions and so on.
In this 21st century country what is the best road vehicle to have. "Best" means the most likely to get you from A to B in the shortest time whilst remaining alive and healthy.
Bear in mind that other laws exist so you can't deliberately murder other motorists, by shooting them for example.
The laws that pertain to collisions etc. are very similar to those applying in pedestrian areas. There are no rules-of-the road in pedestrian-only areas but you are still not allowed to run around waving a chainsaw and threatening other people.
To those who are voting to close because the question is 'too broad', I'd like to point out that I'm simply asking for the most suitable mode of transport as defined by getting from A to B as quickly and safely as possible. I don't think that could be any clearer or better defined. In fact I'd claim that it is more clearly defined than the majority of the questions on this site. If I left out 'safely' or left out 'quickly' it would be a completely different question.
To those who are voting to close because "answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise", you obviously haven't read the answers because there are facts, expertise (personal knowledge) and references in several of them. Most questions on WB get some answers that are of lower quality but that isn't the fault of the questioner.