Shamelessly stealing a comment from another site on this:

u/rogtharg
It is, there are like only three major roads leading on and off Crimea. This one is the one furthest away from the frontline and pointing towards Melitopol which is one of the cities Ukraine is hoping to reach with their counter offensive to cut the Russians in half.

Two other roads point more towards Kherson and where the dam was, so a bit of two roads to nowhere atm.

It seems this is to further limit resupply routes for Russia.