Right to Left Driving Switch

Suppose you live in a country in which the driving is on the right and there is to be a change to driving on the left. If highways with on-ramps and off-ramps, and so on are built for driving on the right, will they work equally well for driving on the left? Of course, we must assume the same patterns of driving speeds as before.

Answer

Yes, as long as the accelerations and decelerations required are within the normal driving ranges, there should be no problems. One could check out each roadway with physical trials, or one could make an aerial video and play back the video in the reverse direction, essentially reversing time. If the car accelerations appear unusual in the reverse sequence, there will be driving problems.

Even nature at the most fundamental level is cognizant of left versus right, a surprising discovery in the 1950s related to the weak interaction, one of the four fundamental interactions, the other three being the gravitational, the electromagnetic, and color (also called the strong interaction). For the latter three, the interaction strengths are the same for left-hand spinning particles and right-hand spinning particles. But for the weak interaction, the evidence shows that nature actually excludes any weak interaction behavior for a right-hand spinning particle! The origin of this behavior biased toward left-hand spinning particles is described by the mathematics in the standard model of leptons and quarks.

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