Explain the difference between protected left-turn phasing and protected-permissive left turn phasing

Subject:Civil EngineeringPrice:2.86 Bought3

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1. Explain the difference between protected left-turn phasing and protected-permissive left turn phasing.
2. How do we define traffic analysis zone (TAZs) in a study area?
3. What is the difference between level terrain and rolling terrain for truck driving