Ma track a rabara a ASV amapangidwa ndi zinthu za rabara zogwira ntchito bwino, zomwe zimakhala zolimba kwambiri pakuwonongeka komanso kusweka, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito m'malo osiyanasiyana ovuta.
Ma track a rabara a ASV amapangidwa ndi zinthu za rabara zogwira ntchito bwino, zomwe zimakhala zolimba kwambiri pakutha komanso kutha kung'ambika, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito m'malo osiyanasiyana ovuta. Chifukwa cha zinthu zake zofewa, ma trackwa sapanga phokoso lalikulu komanso kugwedezeka pang'ono panthawi yogwira ntchito, zomwe nthawi zambiri zimapangitsa kuti nthaka isawonongeke kwambiri, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pa udzu, minda, ndi malo ena ovuta.
Chifukwa cha zinthu zake zofewa, njanjizi sizipanga phokoso lalikulu komanso kugwedezeka pang'ono panthawi yogwira ntchito, zomwe nthawi zambiri siziwononga nthaka kwambiri, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pa udzu, minda, ndi malo ena ovuta.