Out of curiosity, exactly what sort of indicators does the game give you that you're about to enter an area too high level for you?
For example, you might know that a certain region is very dangerous. Going there when you're low level will likely result in your untimely death.
You know that the Ashlands are a very dangerous place... If you go there as soon as you're off the ship you deserve to die.
You know that a certain guy is likely the most powerful wizard in all of tamriel, and the dungeon below his tower is rumoured to be extremely dangerous and filled with all kinds of corpus monsters. It would be wise not to attempt to get there until you're high level.
On the other hand, the route from seyda neen to balmora is used quite often by all kinds of individuals, without the need for additional protection and bodyguards... So it's reasonable to think you can survive there even at lvl 1... So long as you don't strife too far from the road