SIPDE

1. Controlled vs Uncontrolled

• Controlled = has a traffic light, stop sign, or yield sign
• Uncontrolled = no signs or signals

How to know:
Look for lights or signs. If you see one → controlled.

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2. 3-way or 4-way

• 3-way = T-shape (one road ends)
• 4-way = + shape (roads cross)

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3. Stopping Point

• White stop line
• If none → crosswalk
• If none → before entering intersection

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4. Two things to watch

• Pedestrians about to cross
• Cars turning without signaling
• Bikes near curb
• Blind spots (buildings, parked cars)

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5. Critical Objects

Roadway Users (CIRCLE)

• Pedestrian → can enter your path suddenly
• Car turning left → may cut you off

Signs & Signals (SQUARE)

• Traffic light → controls right of way
• Stop/Yield sign → forces decision

Road Characteristics (TRIANGLE)

• Multiple lanes → confusion risk
• Crosswalk → pedestrian risk

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6. Label lanes with arrows

• Straight → ↑
• Left turn → ←
• Right turn → →

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7. Protected LEFT arrow?

• Yes → green arrow present
• No → only regular green (must yield)

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8. Protected RIGHT arrow?

• Yes → green arrow present
• Usually no → follow normal right turn rules

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9. Right turn on red?

• Yes IF:
  • Full stop
  • No “No Turn on Red” sign
  • Way is clear
• No if sign says not allowed

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Quick Checklist

• Signal/sign → controlled
• Shape → 3 or 4 way
• Stop point → line / crosswalk
• 2 roadway users
• 2 signs/signals
• 2 road characteristics
• Lane arrows
• Left arrow?
• Right on red?