When I was young and learning this character 路, I was taught that 路 is related to 足 for people walking on 路 with 足. However nobody actually explained why 各 is used here. Now with our solid understanding of the original meaning of 足 and 各, we shall have a much better understanding.
Recall that 足 (with its Oracle Script ) originally contains then meaning of "walking - towards the target place - ", while 各 (with its Oracle Script ) has the original meaning of "walking - towards our place ". Looking at and , does not it show clearly the idea of a left hand traffic rule, same as shown in below image?
|Left Hand Traffic|
That is right, 路 was created to mean road. And it does provide us the vivid view that ancient China adopted left hand traffic rule.
And from the way 路 was created, 路, unlike another Chinese character 道, normally refers to roads that are formed naturally by people who keeps walking on it.