That isn't a bug or an issue, that's a design choice. If the construction aspect interests you, perhaps having a look at a construction simulation game is the way to go.
If by "you cannot build a normal asphalt road" you are unhappy with the look of the default asphalt road, then you really should check out the workshop under Roads as there's different options there including a very plain asphalt road, which might be more what you're looking for.