Iyi tunnel yekugeza mota ine 9 mabhurashi, uye inogeza ese emota, zvese uchishandisa mvura shoma uye yakaderera simba rekushandisa. Iyi yekugezesa mota inovandudza kugona kwekuwacha, inochengetedza zvinoshandiswa, uye inowedzera purofiti yevatengi, ichiita iyi inotakura mota yekugeza ive yakakurumbira sisitimu pakati pevatengi vedu.