4.2.2. Critical characteristics

Try these first

1. 1.

   What is reaction time in terms of road users?

   Hint

   Think about how quickly someone can react when they see a stop sign.

2. 2.

   Name one psychological factor that can affect driving performance.

   Hint

   Consider what might distract a driver.

3. 3.

   What is the primary focus of the critical characteristics section?

   • Quantifiable characteristics only
   • Less quantifiable characteristics only
   • Both types of characteristics

   Hint

   Look for definitions in the glossary.

4. 4.

   True or False: Visual acuity only affects the ability to read road signs.

   • True
   • False

   Hint

   Consider how vision impacts driving actions.

5. 5.

   Design a transportation system that addresses both quantifiable and less quantifiable characteristics of users. Consider specific examples of each.

   Hint

   Think of how environments can impact user experiences.

6. 6.

   Evaluate a traffic signal timing system that uses the 85th percentile for reaction time. Discuss its implications for different road users.

   Hint

   Consider demographics when analyzing traffic systems.