39.4. Types of Intersection Control

Try these first

1. 1.

   What is an at-grade intersection?

   Hint

   Think about how roads intersect at the same height.

2. 2.

   Name one type of traffic control used at at-grade intersections.

   Hint

   Consider the signs that direct or stop traffic.

3. 3.

   What is the main benefit of a grade-separated intersection?

   • Increased traffic volume
   • Reduced conflict points
   • Lower construction costs

   Hint

   Think about why vertical separation may reduce accidents.

4. 4.

   True or False: At-grade intersections always require traffic lights.

   • True
   • False

   Hint

   Consider the difference in traffic volume.

5. 5.

   Design a new at-grade intersection that minimizes pedestrian conflicts while accommodating bicycle lanes.

   Hint

   Consider the flow of both vehicles and pedestrians.

6. 6.

   Evaluate the performance of an existing grade-separated interchange and suggest enhancements based on current traffic conditions.

   Hint

   Look into recent traffic data to inform your evaluation.