"Fupa la galu" mozungulira? Dzina lachidwi limachokera ku mawonekedwe ake omwe, akawonedwa kuchokera pamwamba, amatenga mawonekedwe apamwamba a ... "fupa la galu", monga momwe timazolowera kuwonera mu zojambula kapena zoseweretsa. Komanso, chifukwa cha mawonekedwe awo, amatha kutchedwa "dontho la madzi" kawiri kuzungulira.
Kwenikweni "fupa la galu" la rotunda limachokera ku kuphatikizika kwa ma rotunda awiri omwe safika pabwalo lathunthu, onse amalumikizana ndi njira ziwiri, makamaka olekanitsidwa ndi thupi, akugwira ntchito ngati rotunda imodzi, koma ngati atapanikizidwa pakati.
Ndilo yankho lomwe likuwoneka lothandiza kwambiri powonjezera kuchuluka kwa magalimoto komanso kuchepetsa kugundana pakati pa magalimoto. Onani momwe zimagwirira ntchito pachithunzichi:
Pachiyambi choyamba, yemwe ali ndi magalimoto akuluakulu, amapewa kugwiritsa ntchito magetsi kuti ayendetse magalimoto, amathandizira kuchepetsa kuthamanga kwa galimoto komanso kulekanitsa bwino kwa magalimoto omwe amapita pakati pa mphambano. Ngati kuli kofunikira kutembenuza njira yaulendo, madalaivala amakakamizika kupita kozungulira kachiwiri.
Chachiwiri, kuchepetsa kugundana pakati pa magalimoto, makamaka chifukwa cha kulekanitsa kwa magalimoto, kuteteza kugundana kutsogolo (pa kugwirizana pakati pa maulendo awiri ozungulira) ndikupewa kuwonjezeka kwa kugundana kwapambali (galimoto yomwe imagundana molunjika mumsewu). mbali ya galimoto ina),
Izi ndi zomwe zidapeza mzinda wa Karimeli, m'chigawo cha Indiana ku USA (nthawi yomweyo kumpoto kwa Indianapolis), womwe umadziwika kale ndi chiwerengerocho (pali kale 138 ndipo sichiyima pano) komanso kuzungulira komwe wamanga kale.
Karimeli ili kale ndi “mafupa a galu” angapo omwe akugwira ntchito - monga momwe zilili muvidiyoyi - zomwe zatenga malo amitundu ina ya mphambano, pansi ndi mseu waukulu wa mzindawo womwe umadutsamo ndikuugawa pakati.
IIHS (Inshuwalansi Institute for Highway Safety kapena Institute Insurance for Highway Safety) inachita kafukufuku woyerekeza chiwerengero cha ngozi isanayambe komanso itatha kumanga "fupa la galu" lozungulira (ndi zaka ziwiri za deta ya ngozi isanamangidwe) ku Karimeli. Zotsatira zake ndi zowunikira: 63% yocheperapo mu chiwerengero chonse cha ngozi ndi 84% zochepa pa chiwerengero cha kuvulala komwe kumakhudza kuvulala.
Kuzungulira kwa "fupa la galu" sikungopezeka ku US kokha, koma kumawoneka kuti ndi dziko lofulumira kwambiri. Atha kugwiritsidwanso ntchito m'malo ena, kupatulapo kukhala ngati mphambano pakhomo/potuluka mumsewu waukulu, monga momwe vidiyo yotsatirayi ikuwonetsera: