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NCHRP Project 17-35: Evaluation of Safety Strategies at Signalized Intersections

 

 

Evaluations of Low Cost Safety Improvements Pooled Fund Study

 

Phase III Balloting Result Summary

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Phase & Priority Strategies Selected in Phases I & II States Scores
Arizona1 California 2 Connecticut 2 Florida 2 Georgia 2 Indiana 2 Iowa 2 Kansas 2 Kentucky 2 Maryland 1 Massachusetts 2 Minnesota 2 Mississippi 2 Montana 1 New York 2 North Carolina 2 North Dakota 1 Oklahoma 2 Pennsylvania 1 South Carolina 2 South Dakota 1 Tennessee 1 Utah 2 Virginia 2 Unknown 2 Sum  Number of Votes  Score per Vote 
I - R5 1. Alternating passing lanes or four-lane sections at key locations to prevent HO crashes   5   2 3 5 5 2     5   1         1   4     4 5 5 47 13 4
I - R7 2. Median barriers for narrow-width medians on multilane roads to prevent HO crashes   4   5 4 4 3   3   4   2   5 1   5   3     5   4 52 14 4
I - R11 3. Install profiled thermoplastic strips for centerlines       1 4   4 3 1   2       3 2   4   5           29 10 3
I - R12 4. Narrow "buffer median" on two-lane roadways   2 1 4 3 3   4 5       3   4 4             2   1 36 12 3
II - R7 5. Increase size and letter height of roadway signs    1 2   1 1   5 4   3   4   2 3   3   1     3   3 36 14 3
II - R10 6. Provide adequate sight distance    3 5 3 3 2   1 2   1   5   1 5   2   2     1   2 38 15 3
  Comments     Provide adequate intersection sight distance                 Proposed Strategies:                                        
Remove signs/more Stop Bar                       -(Score 3)                                                                                                                                              Safety Wedge (on edge of pavement)            -(Score 4)             
Rumble stripes/profile stripes                       -(Score 5)                        
Wider Pavement Markings ( 4” – 6”)              -(Score 1)               
Flashing Yellow Permissive Left Turn Arrows -(Score 2) 
Lighting at rural intersection                          -(Score 4.5)