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Cassidy Cassidy Presentation Transcript

  • ALL ABOUT STOP AND GOLIGHTSBY: CASSIDY
  • HOW DO PEOPLE USE IT They use it to tell them when to stop or to go. So thenthey don’t crash their car.
  • WHY DO PEOPLE NEED IT They need it because they might crash there car if theboth sides go at the same time.
  • When was it mostly been used forthe first time In 1882.
  • Who invented it Garrett Morgan was one of the first inventors. I do notknow who was the first person really made it.
  • HOW HAS IT CHANGED OVER THEYEARSIt has changed by not using a lever and being so close to it.The reason why they changed it so fast is because it exploited.Then it maybe killed a man.
  • WHAT ARE THE ADVTGES They help us not get in car crashes. Or they help uskeep are kids safe.
  • WHAT ARE THE DISADVENTEGES Some bad things about them are easy to vandalize oreasy to be knocked down in a storm.
  • WHAT IS Similar I think a stop and go sign , yield sign and the speedlimit signs.
  • PICTURES
  • WHAT IS IT MADE OUT OF It is made out of a timer, wirers and it used to havelever.