CRASH MODIFICATION FACTORS CLEARINGHOUSE

CMF / CRF Details

CMF ID: 3139

Convert a Type I exit ramp to a Type II exit ramp

Description:

Type I is a full width parallel from tangent that leads to either a tangent or flat exiting curve which includes a decelerating taper. The horizontal and vertical alignment of type I exit ramps were based on the selected design speed equal or less than the intersecting roadways. Type II is when the outer lane becomes a drop lane at the exit gore forming a lane reduction. A paved and striped area beyond the theoretical gore were present at this type of exit ramps to provide a maneuver and recovery area.

Prior Condition:  No Prior Condition(s)

Category: Interchange design

Study: Safety Evaluation of Truck-Related Crashes at Freeway Diverge Areas, Zhenyu Wang, Bin Cao, Weiping Deng, Jian John Lu, and Zhao Zhang, 2011

Star Quality Rating:	[View score details]
Rating Points Total:	115

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