4.0 Streets and Transportation Design

Question 1

Sight Distance at Intersections

Answer 1

• Should be clear of obstructions that block the driver’s view
• Clear sight triangle dimensions depend on design speed and types of traffic control
• 2 types: approach sight triangles & departure sight triangles (different decision points)

Question 2

Sight Triangle based on intersection control

Answer 2

Case A: No Control
Case B: Stop control on the minor road
Case C: Yield control on the minor road
Case D: Traffic signal
Case E: All-way Stop
Case F: Left turn from the major road