Yaushe aka ƙirƙira hanyar wucewa?
Yaushe aka ƙirƙira hanyar wucewa?
Anonim

1951

Kawai haka, yaushe ne farkon hawan zebra?

1949

shin maɓallan da ke kan hanyoyin wucewa suna aiki da gaske? A manyan hanyoyin cunkoson ababen hawa a lokutan da ake yawan zirga-zirgar rana, da maɓalli kar a yi yi komai. The tsallake-tsallake Alamu koyaushe za su kunna, akan jadawali. A cikin ƙananan wuraren fatauci inda mutane ba sa tafiya da yawa, da tsallake-tsallake Alamu ba za su kunna ba sai kun danna alamar maballin. Abu daya da elevator maɓalli.

Hakazalika, wanene ya ƙirƙira mashigar ƙafa?

Na farko mashigar tafiya An kafa sigina a Bridge Street, Westminster, London, a cikin Disamba 1868. Ra'ayin John Peake Knight, injiniyan jirgin kasa ne, wanda ya yi tunanin cewa zai samar da hanyar da za ta ba da izini lafiya. masu tafiya a ƙasa ku giciye wannan titin mai yawan aiki.

Menene duk hanyar wucewar tafiya?

Duka-Tafiya Crosswalk. Duka-tafiya mararraba, wanda kuma aka sani da keɓancewar mahaɗan masu tafiya, an tsara su don rage ko kawar da karo tsakanin masu tafiya da ababen hawa. Lokacin da ababen hawa ke da koren haske, za a dakatar da masu tafiya a ƙasa.

Shahararren taken