Fundamental diagram of traffic flow

High school (ages 12+)
Transportation

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/fundamental-diagram-of-traffic-flow

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the conceptual framework?A macroscopic traffic model relating traffic density, speed, and flow
2. What is the originator concept?Developed from empirical observations and theoretical analysis of traffic stream behavior
3. Why does traffic speed go down when there are more cars?When more cars are on a road, they have to stay closer together, so each driver slows down to avoid bumping into the car ahead.
4. What happens when traffic gets too crowded?When the road is very crowded, the flow of cars actually starts to drop because cars move so slowly that fewer cars can pass a point each hour, leading to a traffic jam.

Traffic Flux (Flow): The rate at which vehicles pass a point or section of a road, typically measured in vehicles per hour.
Traffic Density: The number of vehicles present within a unit length of roadway, typically measured in vehicles per kilometer.
Capacity: The maximum rate at which vehicles can pass through a point or section of a road under prevailing conditions.