Extrapolate your example to most of the west haha.
It is true taiwan has fairly decent (smooth) roads. As mentioned above Population density plays a huge part in that. The problem is they intentionally funnel truckloads of money to make work projects doing them…they can easily do better jobs in construction and funnel their corruption funds into other make work projects that actually further stimulate the society and economy further veenfiting taiwan and thus we all get richer and they can have bigger project funds for their buddies.
Every single year i have lived in this tiny village they have redone the roads here. They intentionally repave THEN decide to rip them to shreds to lay in new water pipes (that are also under sized, future make work project). Then repave. Then rip the roads to shit to redo the ditches and add barriers. Then repave. Now to put in undergound electrical lines, and now repaving. Next years project? Meanwhile we have no water reservoirs serving the beeds to locals. No government is that innept. Its clearly intentional.
Do you know why? Because every other European needs to cross Belgium to go anywhere, I guess Belgium has the most trucks crossings in Europe. And no other country wanted to pay road taxes to cross.
EU roads vary a lot by location. I have to say even in Taitung roads are mostly good.
Worst I seen in modern nation was local area in portland oregon area, the road was full of holes so much so that the friend I visited said if your not careful you will get a easy flat tyre.