How should road shoulders constructed along pavement edges be designed_______________?
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Answer: A. rougher than the traffic lanes
Explanation
Road shoulders are deliberately textured to create auditory and tactile warnings for drivers. A rougher surface alerts motorists who accidentally drift away from the main traffic lanes. This safety feature helps prevent run-off-road accidents caused by driver fatigue or distraction. Road shoulders provide lateral structural support for the pavement edge and travel lanes. They also serve as emergency stopping areas for disabled vehicles away from moving traffic. Surface texture design balances drainage requirements with safety and driver guidance functions.
Highway safety engineering incorporates forgiving roadside designs to protect errant motorists. Rumble strips and textured shoulders significantly reduce fatal single-vehicle highway crashes. Clear visual and tactile delineations improve nighttime and bad-weather driving conditions. Making shoulders smoother than traffic lanes would encourage unsafe high-speed passing maneuvers. Matching the pavement color reduces contrast and makes shoulder boundaries difficult to distinguish. Low load-bearing capacity would cause shoulders to fail under emergency heavy vehicle loads.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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