Chapter 10: Negotiating Intersections

10.1 Searching Intersections

• Objectives:

  • Identify intersections and actions to take when approaching them.

  • Describe what to do in a closed front zone.

• Key Vocabulary:

  • Intersection: A place where roadways meet or cross.

  • Point of No Return: The point where a driver can no longer stop safely.

  • Safety Stop: Advance positioning for better visibility at intersections.

• Identifying Intersections:

  • Intersections are high-risk situations for collisions.

  • Key indicators include traffic lights, signage, pedestrian activity, and changes in road markings.

  • Common configurations: T-intersections, Y-intersections, circular intersections.

• Approaching an Intersection:

  • Establish line-of-sight despite obstructions.

  • Conduct structured checks 12-15 seconds ahead for signs and controls.

  • Utilize the IPDE process (Identify, Predict, Decide, Execute).

    • Point of No Return: About 2 seconds before reaching it, ensure you make a safe decision.

• Deciding to Stop:

  • Check rear zone for approaching vehicles before braking.

  • If vision is obstructed at a stop, perform a safety stop to enhance visibility.

10.2 Determining Right of Way and Judging Gaps

• Objectives:

  • Define right of way and situations where yielding is necessary
    - Predict timing for merging into traffic.

• Right of Way:

  • Right of way is a privilege given by other drivers; it cannot be assumed.

  • Common yielding scenarios include:

    • Stop signs, yield signs, all pedestrian crossings.

    • Four-way stops, alley exits, and turning left at intersections.

• Judging Gaps:

  • Essential to assess the gap between vehicles for safe entry into traffic.

  • Factors influencing gap size include speed of oncoming traffic and intended maneuvers (turning vs. crossing).

10.3 Controlled Intersections

• Objectives:

  • Describe entries and actions at intersections controlled by signs/signals.

• Traffic Signal Operations:

  • Types of Lights:

    • Fresh green (newly turned green), stale green (has been green for a while), yellow (indicates imminent change).

  • Actions to take on green, yellow, and red lights.

• Controlled Intersections with Signs:

  • At STOP signs: full stop before the line, crosswalk, or intersection.

  • At YIELD signs: slow down and yield to other traffic.

10.4 Uncontrolled Intersections

• Objectives:

  • Identify characteristics of uncontrolled intersections and appropriate driver actions.

• Characteristics:

  • No signs or signals to regulate traffic; common in low-traffic areas.

  • Look for blind spots or blockages that limit visibility.

• Right of Way:

  • The vehicle on the right has the right of way if multiple vehicles approach simultaneously.

10.5 Railroad Crossings

• Objectives:

  • Differentiate between active and passive crossings and determine the actions required at both.

• Warnings:

  • Active crossings have signals/gates, while passive may have signs without signals.

  • Always stop, look, and listen at crossings. Wait until signals have stopped.

10.6 Roundabouts

• Objectives:

  • Discuss benefits for drivers and pedestrians, flow comparison, and entry procedures.

• Benefits:

  • Enhanced safety due to reduced head-on collisions and eliminated left turn conflicts.

  • Improved traffic flow and reduced delays entries.

• Entering a Roundabout:

  • Yield to traffic already circulating; enter when there’s a safe gap.

  • Use appropriate signaling when exiting and choose correct lanes based on desired exit.