Ndiudze nezvemarudzi akasiyana-siyana emigwagwa muU.S.A.?
Nzira dzavose muUnited States of America dzinonyanya kugadzirwa neHighways uye Local Roads. United States Department of Transportation's Federal Highway Administration (FWHA) inoronga migwagwa zvichibva pamabasa ayo anogadzirwa zvichibva pazvinhu zvakaita sekumhanyisa kumhanya, kureba kwenzira uye nzvimbo. Tichifunga nezvezvinhu zvinoitwa nemigwagwa, tinogona kuisa migwagwa mumapoka anotevera. 1. Zvinhu zvose. Interstates uye Arterial System 2. Kuziva Mwari. Mimwe Mitsipa 3. Kuita zvinhu nenzira yakanaka. Vanounganidza 4. Vanhu vomunzvimbo yacho  Gadziriro yeInterstate ndiyo iri pamusoro penzira dzinoshanda dzokusiyanisa nzira. Anosanganisira Migwagwa mikuru neFreeways ine miganhu yakakwirira zvikuru yokumhanya uye inobvumira kufamba daro refu pasina kukanganiswa kukuru. Anogadzirwa achishandisa mitemo yakarurama, zviratidzo uye achitarisira kuchengeteka. Dzimwe nguva dzinonziwo Migwagwa yeArtery sezvo dzichipa kubatana kwakakosha munzvimbo dzese muAmerica. Interstate 95 kana kuti I-95 muenzaniso wemugwagwa mukuru wakadaro uri kumahombekombe ekumabvazuva kweUnited States unobva kuFlorida uchienda kuMaine. Sangano reMain Arterial rinosanganisirawo migwagwa mikuru yeU.S., iyo inopa kubatana munzvimbo dzisina Interstate inotsigira kufamba.  Dzimwe nzira huru dzinosanganisirawo migwagwa mikuru nemigwagwa mikuru iyo inowedzera hurongwa hweInterstate hwakatsanangurwa pamusoro apa. Vane mwero wokumhanya wakaderera zvishoma. Anowanzobatanidza maguta nenzvimbo dzomumaguta. Funga nezvazvo semigwagwa mikuru miduku. Semuenzaniso, North Carolina Highway 55 (NC-55) ndiyo huru yehurumende yemugwagwa unobatanidza nzvimbo dzakawanda dzematunhu nemaguta mudunhu reNorth Carolina.  Zvinhu zvinounganidza zvinhu zvinokosha pakubatanidza vagari vomumaguta vachishandisa migwagwa yomunharaunda nemigwagwa mikuru yeInterstate pazvinenge zvakakodzera. Dzinokanganiswa kakawanda uye hadziiti nguva yakareba. Dzinotovawo nemipimo yakaderera yokumhanya (30-35 mph). Idzi dzinogona kubatanidza migwagwa yenyika inobatanidza migwagwa yomunzvimbomo nemigwagwa mikuru.  Pakupedzisira migwagwa yomunzvimbomo inopa kubatana pakati pemapoka, matunhu, mapurazi nedzimwe nzvimbo dzomunzvimbomo. Anoumba chikamu chikuru chenzira dzeUnited States.