TOEFL Reading Academic Passage Practice #012 - The Origins of the Modern Traffic Light

What you will practice

• Reading comprehension
• Evidence and inference
• Time management

Topic: Biology · Read an Academic Passage

Passage preview

Before electric traffic signals existed, city intersections relied on police officers manually directing carriages, bicycles, and pedestrians with hand signals and whistles. As cities grew more congested in the early twentieth century, this approach became…