${s.name}: ${pick(title, 'en')}
Common warning, regulatory and guide signs and what to do when you see them. — Part 1
문제는 독자적으로 작성되었으며 공식 매뉴얼 "${s.manual.title}"(${s.manual.edition}), ${s.agency}을 기반으로 합니다.
Did you know?
- In 1915, the first stop sign was used in Detroit.
- In 1917, Michigan painted the first center line on a state highway, the Marquette-to-Negaunee Road.
- In 1920, the first four-way traffic signal with red, yellow and green lights was used at Woodward Avenue and Fort Street in Detroit.