Roads or paths lead you to some place.
if you want to reach Thanjavur from Trichy, you drive on the road which connects the two places.
But, wait, this may be called Trichy Thanjavur high way, but.it is not designed for only for the two cities
it connects many towns and villages along the way
wait again, it also is used by people living across the road and along the road.
in other words, the roads thought designed as directional paths, they are also spaces where there are other users
these other road users will not consider these roads as directional paths, let alone uni directional!
yes, roads are multi directional spaces and you can expect hazards from 360 degrees.
hence reduce the speed where there are other road users suing the roads as "spaces"
you do not automatically have the right off way either!