Singowona mvelisi mkhulu waseTshayina kunye nomzi-mveliso womatshini wokumakisha wendlela weconvex oziqhubayo.Ngokweenkcukacha-manani zamazwe ngamazwe, iingozi zendlela ziya kuncitshiswa ngaphezu kwe-30% emva kokuba imigca ye-convex yamkelwe, ukwenzakala kunye nokulahlekelwa kwezoqoqosho kuncitshiswe kakhulu.Ngenxa yoko iingcali zibhenela ukusetyenziswa kolu hlobo lomgca wamanqaku njengomgca osemgangathweni wokhuseleko lwezithuthi.