Ngokusekelwe embhalweni oyisihluthulelo, kungani ingxenye esempumalanga yaleli bhuloho yakhiwa kabusha?
Context:ISan Francisco-Oakland Bay Bridge, eyaziwa endaweni ngokuthi iBay Bridge, iyinkimbinkimbi yamabhuloho ahlanganisa iSan Francisco Bay eCalifornia. Njengengxenye ye-Interstate 80 nomgwaqo oqondile phakathi kweSan Francisco ne-Oakland, uthwala izimoto ezingaba ngu-260.000 ngosuku emibhoshongweni yayo emibili. Ingenye yezindawo ezinde kunazo zonke e-United States.  Leli bhuloho elalikhokhelwa imali laqanjwa ekuqaleni kwezinsuku zeCalifornia Gold Rush, lapho "uMbusi" uJoshua Norton ayemkhulumela, kodwa ukwakhiwa kwalo akuzange kuqale kwaze kwaba ngo-1933. Yaklanywa uCharles H. Purcell, futhi yakhiwa yi-American Bridge Company, yavulwa ngoLwesine, ngo-November 12, 1936, kusasele izinyanga eziyisithupha ngaphambi kweGolden Gate Bridge. Ekuqaleni yayihamba ngezimoto ezisezingeni eliphezulu, ngamaloli, izimoto, amabhasi nezitimela ezihamba ngezansi, kodwa ngemuva kokuthi i-Key System ishiye insizakalo yezitimela ngo-Ephreli 20, 1958, idokodo elingezansi nalo laguqulwa laba yimigwaqo yonke. Ngo-October 12, 1963, izimoto zaqala ukuhamba ngendlela eyodwa emgodini ngamunye, zaya ngasentshonalanga emgodini ongaphezulu, zaya ngasempumalanga emgodini ongezansi, amaloli namabhasi avunyelwa emgodini ongaphezulu.  Ngo-1986, leli bhuloho lanikezelwa ngokungemthetho kuJames Rolph owayengumbusi waseCalifornia.  Leli bhuloho linezigaba ezimbili zobude obulinganayo; ingxenye endala esentshonalanga, eyaziwa ngokusemthethweni njengeWillie L. Brown Jr. Bridge (ngemuva kukaMeya waseSan Francisco kanye noSomlomo weCalifornia State Assembly uWillie L. Brown Jr.), ixhuma enkabeni yedolobha laseSan Francisco neJerba Buena Island, kanti ingxenye entsha engasempumalanga engaziwa ixhuma lesi siqhingi ne-Oakland. Ingxenye esentshonalanga iyibhuloho elinamathiselwe kabili elinemibhoshongo emibili, ithrafikhi ebheke entshonalanga iqhutshwa embhoshongweni ongaphezulu kuyilapho ithrafikhi ebheke empumalanga iqhutshwa embhoshongweni ongezansi. Ingxenye enkulu yesigaba sokuqala esingasempumalanga yayiyibhuloho elingenamikhono.  Phakathi nokuzamazama komhlaba kwaseLoma Prieta ngo-1989, ingxenye yedeski eliphezulu lengxenye esempumalanga yawela esitezi esiphansi futhi leli bhuloho lavalwa inyanga yonke. Ukwakhiwa kabusha kwesigaba esisempumalanga kwebhuloho njengendlela yokuxhuma ebhulohweni elinamathiselwe elizihlanganisile kwaqala ngo-2002; isigaba esisha esisempumalanga savulwa ngoSepthemba 2, 2013, ngezindleko ezibikwe ezingaphezu kuka- $ 6.5 billion; ukulinganiselwa kwasekuqaleni kwezigidi ezingama- $ 250 kwakwenzelwe ukulungiswa kokuzamazama komhlaba kwe-span ekhona. Ngokungafani nengxenye esentshonalanga nengxenye yasempumalanga yangempela yebhuloho, ingxenye entsha esempumalanga ingumpheme owodwa ophethe yonke imigwaqo eya empumalanga nentshonalanga. Ukudilizwa kwesigxobo esidala sasempumalanga kwaqedwa ngoSepthemba 8, 2018.
Ingxenye esempumalanga yaleli bhuloho yakhiwa kabusha ngenxa yokuthi ingxenye yedeski layo eliphezulu yawa phezu kwedeski elingaphansi ngesikhathi sokuzamazama komhlaba kwaseLoma Prieta ngo-1989.