<prompt> Kwakunama-sidings ezinhlangothini zombili futhi ekuqaleni kwakunamabhokisi amabili omsakazo.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yomusho ithi Kwakukhona ama-sidings ezinhlangothini zombili futhi ekuqaleni kwakukhona amabhokisi amabili amasignali, elinye lawo lasuswa ekuqaleni kwekhulu lama-20. 