Geometric design of roads

High school (ages 12+)
Geography

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/geometric-design-of-roads

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 core objectives of geometric design?Maximize safety and efficiency, minimize cost and environmental impact, and enhance livability
2. What is the three defining geometric elements?Alignment (horizontal path), Profile (vertical elevation changes), and Cross-section (width, lanes, banking)
3. Why do roads have curves and banking?Curves let cars turn smoothly, and banking (superelevation) helps cars stay on the road at higher speeds by countering sideways forces.
4. How do engineers decide how steep a road can be?They use the profile, which shows the road’s height changes, and make vertical curves so drivers can see ahead and stay safe.

Geometric Design: The engineering discipline focused on the spatial layout and physical elements of roadways.
Alignment: The horizontal course of a road, comprising tangents and horizontal curves.
Profile: The vertical course of a road, including grades and vertical curves (crest and sag).
Cross-section: A transverse slice of a road showing its width, lanes, shoulders, and cross slope.