Road blocked by stone arc?

In Tropico 4, Mission 5 there is a stone arc that leads to two mines (gold and iron).

Unfortunately I am unable to get there, because said arc seems to prevent any roads from being built underneath it!

arc blocking road

Is this a bug? (I sure hope so)

Is there any alternative way to get to the ressource fields?


I noticed this too when I played that mission. I believe it to be a bug.

My workaround was to build 2 roads and have a small gap under the arch. Not ideal, and I'm not sure either road was ever actually used, but it worked.