Safety Aspects on Road Design Flashcards
Explain Safety Identification/Assessment Cycle.
What distinctive
elements are
there of a road?
Explain Road Crossection.
Explain components of Highway design.
How to Improve Curve Safety?
Explain road transitions.
Describe curve design elements.
Describe key factors for speed in curve.
Aside from physical affect of acceleration, which factors are cruical in curve design?
Explain Operational Limits.
When does single vehicle crashes often occur?
Single Vehicle Crashes
• A severe and common crash type outside urban conditions are
single vehicle crashes, also known as Run Off Road
• Occur most often on straight sections in sunny conditions!
– Why?
• Also cluster in curves
– Why?
• Are there road design or operational conditions that encourage
single vehicle crashes?
Explain relationship between speed and angle in crash history.
What are the main first harmful event in crashes.
Describe safety systems in general.
Safety Systems
• Vehicles leaving the road strike objects causing severe
collisions or rollovers
• Collisions on roads between vehicles or vehicles and Vulnerable
Road Users can be addressed by vehicle safety systems
• Protecting vehicle occupants when the vehicle leaves the road
requires different protection strategies
• Passive safety systems have been developed
– Still result in a collision, but the collision should be less
severe than if the protective system was not installed
What is the
Challenge for
Road
Designers?
Which factors do lateral loading depend upon?
Describe general frontal vehicle geometry.
What are frangible structures?
Explain Frangible Devices.
What are crash cushions?
Explain compatibility crash cushion.
