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This appendix presents accident type distributions by ramp segment type for the following eight selected ramp types in tables 56 through 63, respectively:

• Rural diamond off-ramps.
• Rural diamond on-ramps.
• Urban diamond off-ramps.
• Urban parclo loop off-ramps.
• Urban free-flow loop off-ramps.
• Urban outer connection off-ramps.
• Urban direct and semi-direct connection ramps.
• Urban C/D roads.

In the tables, accident types are classified into the following categories:

• Single-vehicle noncollision accidents:
• Ran off raod
• Overturned
• Other
• Single-vehicle collision accident with:
• Parked vehicle
• Pedestrian
• Fixed object
• Other collision
• Multiple-vehicle collision accidents:
• Head-on
• Sideswipe
• Rear-end
• Angle
• Left turn
• Right turn
• Other collision

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U.S. DOT FHWA
Turner-Fairbanks Highway Research Center