On the other hand, autovías are usually (though not always) upgrades from older roads, and always untolled. In general, slow vehicles like bicycles and agricultural machinery are allowed under certain restrictions so as to not disrupt the traffic excessively or cause any danger. Furthermore, an "autovía" will most likely follow the original road very closely, only deviating from it to bypass the towns (which are looped around in "variantes"). Thus, the upgraded road usually serves as the base for one of the two directions of the new autovía, which means the turns can be steeper than in autopistas. All in all, an "autovía":