Fundamentals of Transportation/Sight Distance/Homework
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Homework
[edit | edit source]- Name five principal characteristics of visual reception important in driving.
- You are shown an accident scene with a vehicle and a tree on uphill grade of 3%. The vehicle was estimated to hit the tree at 120 km*h−1 . The average length of skid marks was 20 meters. You have found that a car traveling that section under similar weather conditions at 60 km*h−1 can stop in 60 m. What was its initial speed?
- Draw a road's cross-section and label the elements.
- How do the calculations of stopping sight distance and passing sight distance differ?
- What is the recommended value used for perception reaction time according to AASHTO?
- What is a standard lane width used in new highway designs (to nearest foot or centimeter)?